Displaying publications 81 - 100 of 1046 in total

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  1. Vu H, Khanh Tuong TT, Hoang Lan N, Quoc Thang T, Bilgin K, Hoa T, et al.
    Clin Ter, 2022 11 15;173(6):565-571.
    PMID: 36373456 DOI: 10.7417/CT.2022.2483
    Background: Various non-invasive methods have been studied for assessing the severity of fatty liver disease and coronary atherosclero-sis. However, the correlation between hepatic steatosis and coronary atherosclerosis has not been fully studied, either globally or specifically in Vietnam. This study investigated the association between nonalcoholic fatty liver disease (NAFLD) and coronary atherosclerosis using coronary computed tomography angiography (CCTA).

    Methods: An analytical cross-sectional study was performed, including 223 patients treated by the Cardiology Department, the Emergency Interventional Cardiology Departments, and the Internal Cardiology Clinic of Thong Nhat Hospital.

    Results: In our cohort of 223 patients, the NAFLD was detected in 66% of the population, the mean coronary artery stenosis (CAS) was 44.54% ± 20.23%, and the mean coronary artery calcium score (CACS) was 3569.05 ± 425.99, as assessed using the Agatston method. The proportion of patients with significant atherosclerotic plaque (CAS 50%) >was 32%, whereas the remaining 68% had insignificant stenosis. Among our study population, 16% had no coronary artery calcification, 38% had mild calcification, and 46% had moderate to severe calcification. In the group of NAFLD patients, 33.3% had significant atherosclerotic plaque, which was not significantly different from the rate in individuals without NAFLD (p = 0.51). Mild coronary artery calcification was detected in 37.4% of NAFLD patients, and moderate to severe calcification was detected in 48.3% (p = 0.45).

    Conclusions: NAFLD was not found to be strongly associated with coronary atherosclerosis in this study. More studies with larger sample sizes remain necessary to verify whether any correlation exists.

    Matched MeSH terms: Tomography, X-Ray Computed
  2. Visvanathan R
    Aust N Z J Surg, 1994 Aug;64(8):527-9.
    PMID: 8048888
    Sixty-nine severely head-injured patients treated by general surgeons over a 28 month period with admission Glasgow Coma Scale motor scores of 3 to 8 were reviewed retrospectively. Fifty-one patients were comatose on admission with periods from injury to admission exceeding 4 h in 34 patients who were referred from peripheral hospitals. Forty patients with acute intracranial bleeding underwent emergency decompressive surgery with 13 good recoveries and 18 deaths; good recoveries were observed in 11 of 20 patients with extradural haemorrhages, one out of eight patients with subdural haemorrhages, and one of 12 patients with intracerebral and/or combined haemorrhages. Twenty-nine patients with no evidence of acute mass lesions were treated medically with sedation, mechanical ventilation and mannitol infusion for cerebral decompression with seven good recoveries and 16 deaths. There were 15 good outcomes in 40 patients with admission motor scores of 6, 7 or 8 and five good outcomes in 29 patients with scores of 3, 4 or 5. A good outcome of 29% in the study may be improved by (i) better neurosurgical training of surgical and nursing staff; (ii) provision of technologically advanced diagnostic and treatment modalities; (iii) an efficient referral system; and (iv) provision of effective long-term rehabilitation.
    Matched MeSH terms: Tomography, X-Ray Computed
  3. Visuvanathan VV, Somawera N, Koh KC
    Malays Fam Physician, 2013;8(3):46-48.
    PMID: 25893060 MyJurnal
    A 19-year-old Chinese man presented with progressive ascending weakness of his left lower limb for 1 week. There was no loss of sensation. His other limbs were unaffected. He also complained of progressive, painless blurring of vision in his left eye for the past 1 month. He has an affinity for wild boar meat from local Chinese restaurants, which he has been consuming on a daily basis for the last 2 years. He denied any fever, headache, high risk behaviour for acquisition of human
    immunodeficiency virus (HIV) infection or recent travels. He had bronchial asthma in childhood, but the symptoms are minimal now and there was no recent acute exacerbations. Physical examination was unremarkable except for the left lower limb power of 3/5 and bilateral papilloedema on direct ophthalmoscopy. A Contrast-enhanced computed tomography (CECT) scan of the brain (Image 1) and Magnetic resonance imaging (MRI) of the brain (Images 2 and 3) were performed. The
    total leucocyte count was 9.2x109/L, C-reactive protein was 1.2 and erythrocyte sedimentation
    rate was 6 mm/h. Human immunodeficiency virus screening was negative, anti-toxoplasma antibodies were not detected and serological testing for anti-cysticercal antibodies via enzymelinked
    immunosorbent assay (ELISA) did not produce a positive yield. He was treated with oral albendazole for 28 days and corticosteroids, which led to rapid and total resolution of his neurological deficits and CT findings within 6 weeks.
    Matched MeSH terms: Tomography, X-Ray Computed
  4. Vinuthinee N, Azreen-Redzal A, Juanarita J, Zunaina E
    Int Med Case Rep J, 2015;8:47-50.
    PMID: 25709507 DOI: 10.2147/IMCRJ.S75198
    We report a rare case of sling shot injury that presented with a gunshot-like wound with preseptal cellulitis, in a toddler. An 11-month-old Malay child presented with a gunshot-like wound over the forehead following sling shot injury. On examination, he had a deep circular laceration wound over the forehead, measuring 2.0 cm in diameter, with minimal bleeding. There was no obvious foreign body seen inside the wound and no palpable foreign body surrounding the wound. The gunshot-like wound was associated with left preseptal cellulitis. A skull X-ray showed a white opaque foreign body in the left frontal bone. Computed tomography (CT) scan of orbit and brain revealed a left comminuted fracture of the left orbital roof, and left frontal brain contusion with prelesional edema. Wound exploration was performed and revealed a 0.5 cm unshattered marble embedded in the left frontal bone. The marble and bone fragments were removed. The left preseptal cellulitis responded well to intravenous antibiotic and topical antibiotic.
    Matched MeSH terms: Tomography, X-Ray Computed
  5. Vinothini R, Niranjana G, Yakub F
    J Digit Imaging, 2023 Dec;36(6):2480-2493.
    PMID: 37491543 DOI: 10.1007/s10278-023-00852-7
    The human respiratory system is affected when an individual is infected with COVID-19, which became a global pandemic in 2020 and affected millions of people worldwide. However, accurate diagnosis of COVID-19 can be challenging due to small variations in typical and COVID-19 pneumonia, as well as the complexities involved in classifying infection regions. Currently, various deep learning (DL)-based methods are being introduced for the automatic detection of COVID-19 using computerized tomography (CT) scan images. In this paper, we propose the pelican optimization algorithm-based long short-term memory (POA-LSTM) method for classifying coronavirus using CT scan images. The data preprocessing technique is used to convert raw image data into a suitable format for subsequent steps. Here, we develop a general framework called no new U-Net (nnU-Net) for region of interest (ROI) segmentation in medical images. We apply a set of heuristic guidelines derived from the domain to systematically optimize the ROI segmentation task, which represents the dataset's key properties. Furthermore, high-resolution net (HRNet) is a standard neural network design developed for feature extraction. HRNet chooses the top-down strategy over the bottom-up method after considering the two options. It first detects the subject, generates a bounding box around the object and then estimates the relevant feature. The POA is used to minimize the subjective influence of manually selected parameters and enhance the LSTM's parameters. Thus, the POA-LSTM is used for the classification process, achieving higher performance for each performance metric such as accuracy, sensitivity, F1-score, precision, and specificity of 99%, 98.67%, 98.88%, 98.72%, and 98.43%, respectively.
    Matched MeSH terms: Tomography, X-Ray Computed
  6. Vinodh VP, Sellamuthu P, Harun RH, Zenian MS
    Med J Malaysia, 2014 Apr;69(2):89-91.
    PMID: 25241819 MyJurnal
    Intraorbital foreign body (IOFB) has been a rare phenomenon in the cases of gunshot wounds and always represents a dilemma in medical management. In Sabah, this scenario is becoming common as there is still certain population in the interiors who owns self made guns for hunting. They either present with self inflicted gunshot injuries or after being mistakenly shot while hunting. There are very few articles on this topic especially when it is located posteriorly in the orbit and occurs without visual impairment. This case reports the challenges faced in the management of the patient with a posteriorly located metallic IOFB. The appropriate management of the patient is discussed based on several international literatures. Author describes a 37 years old male farmer, who was referred from a nearby district hospital after he sustained gunshot injuries to his face and scalp. Urgent computed tomography (CT) scan showed that bullet pellets were at the left orbital floor, the left mandible and the left frontal bone. All bullet pellets were located extracranially only without intracranial involvement. Patient clinically does not have any neurologic deficit and without any visual impairment, thus he refused any surgical intervention. As there is no proper guideline in managing such cases, decision was made based on evidences from international literatures. It was concluded that metallic IOFB located in the posterior orbit may be conservatively managed with observation and regular follow-ups as they are well-tolerated and does not cause much impact on visual deterioration unless inflammation, infection, optic neuropathy or functional deficit occurs. This avoids unnecessary surgery and prevents risk of iatrogenic injury to the eye.
    Matched MeSH terms: Tomography, X-Ray Computed
  7. Vincent K, Cheah SD
    Med J Malaysia, 2018 12;73(6):425-426.
    PMID: 30647222
    Traumatic abdominal wall hernia (TAWH) after blunt injury is uncommon. Diagnosis requires careful examination and high index of suspicion. We report a case of a 12-year-old boy who complained of painful abdominal swelling over the left iliac fossa after a bicycle-handlebar hit his abdomen. TAWH was diagnosed clinically and confirmed with ultrasound and computed tomography (CT) scan. He developed incarceration after 12 hours of admission and subsequently underwent primary repair without mesh. As TAWH is usually associated with other concomitant injuries, it is important that we are meticulous to rule out other serious concomitant injuries.
    Matched MeSH terms: Tomography, X-Ray Computed
  8. Vijayananthan A, Arumugam A, Kumar G, Harichandra D
    Biomed Imaging Interv J, 2008 Apr;4(2):e23.
    PMID: 21614326 MyJurnal DOI: 10.2349/biij.4.2.e23
    Atypical mycobacterium is rarely seen as a cause of chronic mastoiditis but has been increasingly recognized over the past few years. Mycobacterium abscessus is the most pathogenic and chemotherapy-resistant, rapid-growing mycobacterium of all the four groups. This paper presents a case of a 57-year-old woman who had chronic mastoiditis with recurrent exacerbations. The initial computed tomography (CT) findings showed the presence of an inflammatory process and she was treated with the appropriate antibiotics. The patient subsequently underwent a tissue biopsy when she presented with another exacerbation. At this time, the CT scan did not identify the ongoing exacerbation, but the Gallium-67 scintigraphy did.
    Matched MeSH terms: Tomography, X-Ray Computed
  9. Vengathajalam S, Retinasekharan S, Mat Lazim N, Abdullah B
    Indian J Otolaryngol Head Neck Surg, 2019 Oct;71(Suppl 1):823-826.
    PMID: 31742073 DOI: 10.1007/s12070-019-01654-6
    Thyroid abscesses are the most rare conditions of the thyroid gland but it could be potentially life threatening. Most patients are immunocompromised or has an underlying chronic thyroid disorder. We report a case of a 58 year-old lady with underlying uncontrolled diabetes mellitus and a long standing uninvestigated goiter who presented with lethargy, a new anterior neck swelling with dysphagia and change of voice. Ultrasound and computed tomography were performed and showed collection with multiple air pockets in the right thyroid lobule extending to the anterior mediastinum. She was started on intravenous antibiotics and underwent serial bedside aspiration. Her symptoms improved and complete resolution was achieved after serial aspirations and antibiotics.
    Matched MeSH terms: Tomography, X-Ray Computed
  10. Veerapen R
    Neurosurgery, 1989 Sep;25(3):451-3; discussion 453-4.
    PMID: 2771016
    Spontaneous hemorrhage into the lateral part of the pons with sequelae compatible with survival has been documented previously. The author describes an unusual case with spontaneous hemorrhage into the lateral pons, with intraneural extension into the right trigeminal nerve root. Radiological features were of an expanding mass of the cerebellopontine angle. The patient was treated surgically with success.
    Matched MeSH terms: Tomography, X-Ray Computed
  11. Veeramuthu, Vigneswaran, Pancharatnam, Devaraj, Poovindran, Anada Raj, Nur Atikah Mustapha, Wong, Kum Thong, Mazlina Mazlan, et al.
    Neurology Asia, 2014;19(1):69-77.
    MyJurnal
    The complex pathophysiology of traumatic brain injury, its cascading effects and a varied outcome suggest that factors such as genetics may permeate and modulate the neurocognitive outcomes in patients with mild traumatic brain injury (mTBI). This study was conducted to determine the relationship between genetic polymorphism of apolipoprotein E, and neurocognitive and functional outcomes in mTBI. Twenty-one patients with mTBI were recruited prospectively. The severity of the injury was established with the Glasgow Coma Score (GCS). Other assessments included the CT Scan of the head on admission, Disability Rating Scale, Chessington Occupational Therapy Neurological Assessment (COTNAB) and Glasgow Outcome Scale (GOS). The Spearmen correlation analysis of ApoE allele status and the cognitive and functional assessments saw some association with the Sensory Motor Ability - Coordination (-0.526, p
    Matched MeSH terms: Tomography, X-Ray Computed
  12. Vairavan R, Abdullah O, Retnasamy PB, Sauli Z, Shahimin MM, Retnasamy V
    Curr Med Imaging Rev, 2019;15(2):85-121.
    PMID: 31975658 DOI: 10.2174/1573405613666170912115617
    BACKGROUND: Breast carcinoma is a life threatening disease that accounts for 25.1% of all carcinoma among women worldwide. Early detection of the disease enhances the chance for survival.

    DISCUSSION: This paper presents comprehensive report on breast carcinoma disease and its modalities available for detection and diagnosis, as it delves into the screening and detection modalities with special focus placed on the non-invasive techniques and its recent advancement work done, as well as a proposal on a novel method for the application of early breast carcinoma detection.

    CONCLUSION: This paper aims to serve as a foundation guidance for the reader to attain bird's eye understanding on breast carcinoma disease and its current non-invasive modalities.

    Matched MeSH terms: Tomography, X-Ray Computed/methods
  13. Vairavan N, Tajunisah I, Subrayan V, Waran V
    Orbit, 2009;28(6):442-3.
    PMID: 19929682 DOI: 10.3109/01676830903103365
    Surgical approaches are becoming increasingly minimally invasive, without compromising either safety or ease. Penetrating ocular foreign bodies has traditionally been approached either by intraocular or supraorbital access. We successfully attempted a minimally invasive approach to remove a retrobulbar foreign body under computer-assisted image guidance in a 19-year-old man involved in an industrial mishap.
    Matched MeSH terms: Tomography, X-Ray Computed
  14. Uthamalingam M, Singh DS
    J Clin Diagn Res, 2016 Jun;10(6):PD05-6.
    PMID: 27504347 DOI: 10.7860/JCDR/2016/18761.7965
    Incidences of cerebral palsy (CP) in children are not quite common even though it is the most common motor disorder in children. Further quality of life in CP cases is not so good in young adult stages and has to face certain problems. However scalp haematoma formation in CP patient without injury to head is rarely been reported. The case is being reported for the first time from Malaysia. We report on a unique case of scalp haematoma in an 18-year-old girl of known CP patient with unknown cause. No history of trauma or fall with any of the focal neurological signs or symptoms was found. Clinical examination showed soft boggy swelling of 8 x 10 cm size, involving most of scalp and upper face. CT - scan showed scalp haematoma with right orbital extraconal lesion. She underwent incision and drainage of scalp lesion; consequently around 100 ml of clotted blood came out. At follow-up she was doing well.
    Matched MeSH terms: Tomography, X-Ray Computed
  15. Umi Kalthum, M.N., Amin, A., Syazarina, S.O., Faridah, H.A.
    MyJurnal
    A 42-year-old Malay gentleman presented with progressive painless blurring of vision on his left eye associated with ocular ache, redness and increasing proptosis. Examination revealed presence of relative afferent papillary defect with visual acuity of counting finger, and 6/6 on the right eye. Extraocular muscle movement of the left eye was restricted to ten percent in all directions. Computed tomography (CT) and magnetic resonance imaging (MRI) showed enhancing mass occupying the left orbital apex. Diagnosis of optic nerve sheath meningioma was made, and patient subsequently went for radiotherapy. His symptoms subsided completely, until he presented with similar visual complains, and fullness of the upper lid two years later. A repeated MRI showed enlargement of superior and lateral recti muscles with extension to lacrimal gland region. Biopsy of the lacrimal gland revealed inflammatory cells consistent of inflammatory pseudotumor. High dose systemic steroid was instituted, followed by slow tapering of oral steroid. His symptoms completely resolved, and latest visual acuity was 6/9, with no recurrence, to date.
    Matched MeSH terms: Tomography, X-Ray Computed
  16. Umapati P, Rajadurai P, Kook SC, Lekhraj R, Singh J
    Med J Malaysia, 1988 Jun;43(2):109-16.
    PMID: 3237126
    Matched MeSH terms: Tomography, X-Ray Computed
  17. Tuang GJ, Zahedi FD, Husain S, Hamizan AKW, Kew TY, Thanabalan J
    Int J Med Sci, 2023;20(2):211-218.
    PMID: 36794158 DOI: 10.7150/ijms.68095
    Introduction: The fundament of forensic science lies in identifying a body. The morphological complexity of the paranasal sinus (PNS), which varies greatly amongst individual, possess a discriminatory value that potentially contributes to the radiological identification. The sphenoid bone represents the keystone of the skull and forms part of the cranial vault. It is intimately associated with vital neurovascular structures. The sphenoid sinus, located within the body of the sphenoid bone, has variable morphology. The sphenoid septum's inconsistent position and the degree, as well as the direction disparities of sinus pneumatization, have indeed accorded it a unique structure in providing invaluable information in forensic personnel identification. Additionally, the sphenoid sinus is situated deep within the sphenoid bone. Therefore, it is well protected from traumatic degradation from external causes and can be potentially utilized in forensic studies. The authors aim to study the possibility of variation among the race, and gender in the Southeast Asian (SEA) population, using volumetric measurements of the sphenoid sinus. Materials and methods: This is a retrospective cross-sectional analysis of computerized tomographic (CT) imaging of the PNS of 304 patients (167 males, 137 females) in a single centre. The volume of the sphenoid sinus was reconstructed and measured using commercial real-time segmentation software. Result: The total volume of sphenoid sinus of male gender had shown to be larger, 12.22 (4.93 - 21.09) cm3 compared to the counterpart of 10.19 (3.75 - 18.72) cm3 (p = .0090). The Chinese possessed a larger total sphenoid sinus volume, 12.96 (4.62 - 22.21) cm3) than the Malays, 10.68 (4.13 - 19.25) cm3 (p = .0057). No correlation was identified between the age and volume of the sinus (cc= -.026, p = .6559). Conclusion: The sphenoid sinus volume in males was found to be larger than those of females. It was also shown that race influences sinus volume. Volumetric analysis of the sphenoid sinus can potentially be utilized in gender and race determination. The current study provided normative data on the sphenoid sinus volume in the SEA region, which can be helpful for future studies.
    Matched MeSH terms: Tomography, X-Ray Computed/methods
  18. Toussaint ND, Pedagogos E, Lioufas NM, Elder GJ, Pascoe EM, Badve SV, et al.
    J Am Soc Nephrol, 2020 11;31(11):2653-2666.
    PMID: 32917784 DOI: 10.1681/ASN.2020040411
    BACKGROUND: Hyperphosphatemia is associated with increased fibroblast growth factor 23 (FGF23), arterial calcification, and cardiovascular mortality. Effects of phosphate-lowering medication on vascular calcification and arterial stiffness in CKD remain uncertain.

    METHODS: To assess the effects of non-calcium-based phosphate binders on intermediate cardiovascular markers, we conducted a multicenter, double-blind trial, randomizing 278 participants with stage 3b or 4 CKD and serum phosphate >1.00 mmol/L (3.10 mg/dl) to 500 mg lanthanum carbonate or matched placebo thrice daily for 96 weeks. We analyzed the primary outcome, carotid-femoral pulse wave velocity, using a linear mixed effects model for repeated measures. Secondary outcomes included abdominal aortic calcification and serum and urine markers of mineral metabolism.

    RESULTS: A total of 138 participants received lanthanum and 140 received placebo (mean age 63.1 years; 69% male, 64% White). Mean eGFR was 26.6 ml/min per 1.73 m2; 45% of participants had diabetes and 32% had cardiovascular disease. Mean serum phosphate was 1.25 mmol/L (3.87 mg/dl), mean pulse wave velocity was 10.8 m/s, and 81.3% had abdominal aortic calcification at baseline. At 96 weeks, pulse wave velocity did not differ significantly between groups, nor did abdominal aortic calcification, serum phosphate, parathyroid hormone, FGF23, and 24-hour urinary phosphate. Serious adverse events occurred in 63 (46%) participants prescribed lanthanum and 66 (47%) prescribed placebo. Although recruitment to target was not achieved, additional analysis suggested this was unlikely to have significantly affected the principle findings.

    CONCLUSIONS: In patients with stage 3b/4 CKD, treatment with lanthanum over 96 weeks did not affect arterial stiffness or aortic calcification compared with placebo. These findings do not support the role of intestinal phosphate binders to reduce cardiovascular risk in patients with CKD who have normophosphatemia.

    CLINICAL TRIAL REGISTRY NAME AND REGISTRATION NUMBER: Australian Clinical Trials Registry, ACTRN12610000650099.

    Matched MeSH terms: Tomography, X-Ray Computed
  19. Topakian R, King A, Kwon SU, Schaafsma A, Shipley M, Markus HS, et al.
    Neurology, 2011 Aug 23;77(8):751-8.
    PMID: 21849657 DOI: 10.1212/WNL.0b013e31822b00a6
    Better methods are required to identify patients with asymptomatic carotid stenosis (ACS) at risk of future stroke. Two potential markers of high risk are echolucent plaque morphology on carotid ultrasound and embolic signals (ES) in the ipsilateral middle cerebral artery on transcranial Doppler ultrasound (TCD). We explored the predictive value of a score based on these 2 measures in the prospective, observational, international multicenter Asymptomatic Carotid Emboli Study.
    Matched MeSH terms: Tomography, X-Ray Computed
  20. Too CW, Fong KY, Hang G, Sato T, Nyam CQ, Leong SH, et al.
    J Vasc Interv Radiol, 2024 May;35(5):780-789.e1.
    PMID: 38355040 DOI: 10.1016/j.jvir.2024.02.006
    PURPOSE: To validate the sensitivity and specificity of a 3-dimensional (3D) convolutional neural network (CNN) artificial intelligence (AI) software for lung lesion detection and to establish concordance between AI-generated needle paths and those used in actual biopsy procedures.

    MATERIALS AND METHODS: This was a retrospective study using computed tomography (CT) scans from 3 hospitals. Inclusion criteria were scans with 1-5 nodules of diameter ≥5 mm; exclusion criteria were poor-quality scans or those with nodules measuring <5mm in diameter. In the lesion detection phase, 2,147 nodules from 219 scans were used to develop and train the deep learning 3D-CNN to detect lesions. The 3D-CNN was validated with 235 scans (354 lesions) for sensitivity, specificity, and area under the receiver operating characteristic curve (AUC) analysis. In the path planning phase, Bayesian optimization was used to propose possible needle trajectories for lesion biopsy while avoiding vital structures. Software-proposed needle trajectories were compared with actual biopsy path trajectories from intraprocedural CT scans in 150 patients, with a match defined as an angular deviation of <5° between the 2 trajectories.

    RESULTS: The model achieved an overall AUC of 97.4% (95% CI, 96.3%-98.2%) for lesion detection, with mean sensitivity of 93.5% and mean specificity of 93.2%. Among the software-proposed needle trajectories, 85.3% were feasible, with 82% matching actual paths and similar performance between supine and prone/oblique patient orientations (P = .311). The mean angular deviation between matching trajectories was 2.30° (SD ± 1.22); the mean path deviation was 2.94 mm (SD ± 1.60).

    CONCLUSIONS: Segmentation, lesion detection, and path planning for CT-guided lung biopsy using an AI-guided software showed promising results. Future integration with automated robotic systems may pave the way toward fully automated biopsy procedures.

    Matched MeSH terms: Tomography, X-Ray Computed*
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