Displaying publications 41 - 60 of 1040 in total

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  1. Rasit AH, Sharaf I, Rahman HA
    Med J Malaysia, 2001 Jun;56 Suppl C:86-8.
    PMID: 11814259
    Ewing's sarcoma is a rare malignant tumor of the foot in children. We report a case of Ewing's sarcoma of the talus in a four-year-old Chinese girl to highlight the initial difficulty in diagnosis and the clinical course of the disease. She was initially diagnosed as osteomyelitis of the talus and died eight months after presentation with pleural and spinal metastases. To the best of our knowledge, Ewing's sarcoma of the talus in a young child has never been reported in Malaysia.
    Matched MeSH terms: Bone Neoplasms/radiography*; Sarcoma, Ewing/radiography*; Talus/radiography*
  2. Wastie ML
    Med J Malaysia, 1994 Sep;49(3):199-204.
    PMID: 7845265
    Matched MeSH terms: Radiography/history*; Radiography/instrumentation; Radiography/utilization
  3. Rathakrishnan V
    Med J Malaysia, 1990 Sep;45(3):254-6.
    PMID: 2152089
    A seven-month-old female child presenting with a large abdominal mass was found on investigation to have a duplex right kidney with a non-functioning obstructed upper moiety and a right ureterocele. The grossly dilated and tortuous upper moiety ureter presented as a large cystic mass on ultrasound and computed tomographic scans.
    Matched MeSH terms: Kidney/radiography; Ureteral Obstruction/radiography*; Ureterocele/radiography*
  4. Yusof WZ, Awang MN
    PMID: 2371041
    Matched MeSH terms: Radiography
  5. Segasothy M, Yi AA, Mohamed S
    Med J Malaysia, 1983 Jun;38(2):94-7.
    PMID: 6621453
    Tuberous sclerosis is a disease with a well known association with renal masses, both cysts and angiomyolipomas. Reported here is a case of a 26 year old woman who had, in addition to angiomyolipomas of the kidneys, adenoma sebaceum, paraungual fibromas, shagreen patches and cerebral tubers.
    Matched MeSH terms: Hemangioma/radiography; Kidney Neoplasms/radiography; Lipoma/radiography
  6. Ngeow WC, Yuzawati Y
    J Oral Sci, 2003 Sep;45(3):171-5.
    PMID: 14650583
    Knowledge of the position of the mental foramen is important both when administering regional anesthesia and performing periapical surgery in the mental region of the mandible. This study determines the position of the mental foramen in a selected Malay population. One hundred and sixty nine panoramic radiographs of Malay patients retrieved from a minor oral surgery waiting list were selected to identify the normal range for the position of the mental foramen. The foramen was not included in the study if there was any mandibular tooth missing between the lower left and right first molars (36-46). The findings indicated the most common position for the mental foramen was in line with the longitudinal axis of the second premolar (69.2%) followed by a location between the first and second premolar (19.6%). The right and left foramina were bilaterally symmetrical in three of six recorded positions in 67.7% patients. The mental foramen was most often in line with the second premolar.
    Matched MeSH terms: Chin/radiography; Mandible/radiography; Radiography, Panoramic
  7. Priyadharshini KI, Idiculla JJ, Sivapathasundaram B, Mohanbabu V, Augustine D, Patil S
    J Int Soc Prev Community Dent, 2015 May;5(Suppl 1):S32-8.
    PMID: 25984465 DOI: 10.4103/2231-0762.156522
    To assess the estimation of chronological age based on the stages of third molar development following the eight stages (A-H) method of Demirjian et al. in Chennai population of South India.
    Matched MeSH terms: Radiography, Panoramic
  8. Abdullah S, Pang GM, Mohamed-Haflah NH, Sapuan J
    J Chin Med Assoc, 2011 Oct;74(10):469-72.
    PMID: 22036140 DOI: 10.1016/j.jcma.2011.08.019
    Melorheostosis is a rare osteosclerotic bone dysplasia. It is usually characterized by dull and aching pain, reduced joint motion and contractures. Classic radiograph findings are of undulating cortical hyperostosis along the length of the bone, simulating a "dripping candlewax appearance". We report two cases of melorheostosis of the ulna bone, diagnosed 6 years apart in two different females in their early 20s. Both the patients presented with the characteristic features of dull and aching pain in the forearm and were treated conservatively. However, we misdiagnosed the first case as bone malignancy and subjected the patient to a biopsy. For the second case, with hindsight we made the correct diagnosis based only on the classic clinical history and radiographs. We believe that the discussion of a misdiagnosed case of melorheostosis with salient findings may be important for clinicians and orthopedicians in day-to-day clinical practice.
    Matched MeSH terms: Radiography
  9. Teoh YX, Othmani A, Lai KW, Goh SL, Usman J
    Comput Methods Programs Biomed, 2023 Dec;242:107807.
    PMID: 37778138 DOI: 10.1016/j.cmpb.2023.107807
    BACKGROUND AND OBJECTIVE: Knee osteoarthritis (OA) is a debilitating musculoskeletal disorder that causes functional disability. Automatic knee OA diagnosis has great potential of enabling timely and early intervention, that can potentially reverse the degenerative process of knee OA. Yet, it is a tedious task, concerning the heterogeneity of the disorder. Most of the proposed techniques demonstrated single OA diagnostic task widely based on Kellgren Lawrence (KL) standard, a composite score of only a few imaging features (i.e. osteophytes, joint space narrowing and subchondral bone changes). However, only one key disease pattern was tackled. The KL standard fails to represent disease pattern of individual OA features, particularly osteophytes, joint-space narrowing, and pain intensity that play a fundamental role in OA manifestation. In this study, we aim to develop a multitask model using convolutional neural network (CNN) feature extractors and machine learning classifiers to detect nine important OA features: KL grade, knee osteophytes (both knee, medial fibular: OSFM, medial tibial: OSTM, lateral fibular: OSFL, and lateral tibial: OSTL), joint-space narrowing (medial: JSM, and lateral: JSL), and patient-reported pain intensity from plain radiography.

    METHODS: We proposed a new feature extraction method by replacing fully-connected layer with global average pooling (GAP) layer. A comparative analysis was conducted to compare the efficacy of 16 different convolutional neural network (CNN) feature extractors and three machine learning classifiers.

    RESULTS: Experimental results revealed the potential of CNN feature extractors in conducting multitask diagnosis. Optimal model consisted of VGG16-GAP feature extractor and KNN classifier. This model not only outperformed the other tested models, it also outperformed the state-of-art methods with higher balanced accuracy, higher Cohen's kappa, higher F1, and lower mean squared error (MSE) in seven OA features prediction.

    CONCLUSIONS: The proposed model demonstrates pain prediction on plain radiographs, as well as eight OA-related bony features. Future work should focus on exploring additional potential radiological manifestations of OA and their relation to therapeutic interventions.

    Matched MeSH terms: Radiography
  10. Bradley DA, Essa RZ, Peh SC, Teow SY, Chew MT, Zubair HT, et al.
    Appl Radiat Isot, 2023 Aug;198:110875.
    PMID: 37257265 DOI: 10.1016/j.apradiso.2023.110875
    Review is provided of a number of low-dose, low dose rate situations that in study require advances in the development of dosimetric facilities. Using a clinical linac set up to provide doses down to the few mGy level, the performance of a real-time radioluminescence system has then been illustrated, accommodating pulsed as well as continuous dose delivery. The system gate times provide for tracking of the pattern of dose delivery, allowing detailed account of dose and dose-rate variations. The system has been tested in both x-ray and electron mode dose delivery.
    Matched MeSH terms: Radiography
  11. Awan D, Bashir S, Khan S, Al-Bawri SS, Dalarsson M
    Sensors (Basel), 2024 Feb 18;24(4).
    PMID: 38400473 DOI: 10.3390/s24041315
    Microwave medical imaging (MMI) is experiencing a surge in research interest, with antenna performance emerging as a key area for improvement. This work addresses this need by enhancing the directivity of a compact UWB antenna using a Yagi-Uda-inspired reflector antenna. The proposed reflector-loaded antenna (RLA) exhibited significant gain and directivity improvements compared to a non-directional reference antenna. When analyzed for MMI applications, the RLA showed a maximum increase of 4 dBi in the realized gain and of 14.26 dB in the transmitted field strength within a human breast model. Moreover, it preserved the shape of time-domain input signals with a high correlation factor of 94.86%. To further validate our approach, another non-directional antenna with proven head imaging capabilities was modified with a reflector, achieving similar directivity enhancements. The combined results demonstrate the feasibility of RLAs for improved performance in MMI systems.
    Matched MeSH terms: Radiography
  12. Al-Busairi WA, Ali FE
    CMAJ, 2003 Jun 10;168(12):1568-9.
    PMID: 12796339
    Matched MeSH terms: Radiography
  13. Al-Juboori MJ, AbdulRahaman SB, Hassan A
    Implant Dent, 2013 Aug;22(4):351-5.
    PMID: 23811720 DOI: 10.1097/ID.0b013e318296583d
    To detect the correlation between crestal bone resorption and implant stability during healing period using resonance frequency analysis (RFA).
    Matched MeSH terms: Jaw, Edentulous, Partially/radiography; Mandible/radiography; Maxilla/radiography; Radiography, Panoramic/methods; Radiography, Bitewing/methods; Alveolar Bone Loss/radiography; Radiography, Dental, Digital/methods
  14. Tandjung YR, Hong CP, Nambiar P, Ibrahim N
    Int Dent J, 2007 Jun;57(3):173-6.
    PMID: 17695738
    A 50-year-old friendly and attractive Chinese lady was examined by the Primary Care Unit, Faculty of Dentistry, University of Malaya. Her requests for treatment included implants and crowns. Two periapical radiographs of teeth 16 and 48 were taken to aid diagnosis. Interestingly, pin-like radio-opaque objects were found over the crown of the impacted tooth 15 and also tooth 17. These objects were initially interpreted as silver points or radiographic artifacts but further investigation employing panoramic radiography revealed the distribution of more radio-opaque objects in the orofacial region. Based on a review of the literature and the opinion of experienced radiology and oral surgery lecturers, these foreign radio-opaque objects were diagnosed as susuks or charm needles.
    Matched MeSH terms: Radiography, Panoramic*
  15. Ng KH, Abdullah BJ, Sivalingam S
    Health Phys, 1999 Jul;77(1):33-6.
    PMID: 10376539
    The medical radiation usage for diagnostic radiology in Malaysia (a Level II country) for 1990-1994 is reported, enabling a comparison to be made for the first time with the United Nations Scientific Committee on the Effects of Atomic Radiation Report. In 1994, the number of physicians, radiologists, x-ray units, and x-ray examinations per 1,000 population was 0.45, 0.005, 0.065, and 183, respectively. (Level I countries had averages of 2.6, 0.072, 0.35, and 860, respectively). In 1994, a total of 3.6 million x-ray examinations were performed; the annual effective dose per capita to the population was 0.05 mSv, and the collective effective dose was 1,000 person-Sv. Chest examinations contributed 63% of the total. Almost all examinations experienced increasing frequency from 1990 to 1994 except for barium studies, cholecystography, and intravenous urography (-23%, -36%, -51%). These decreases are related to the increasing use of ultrasound and greater availability of fiberoptic endoscopy. Notable increases during the same period were observed in computed tomography (161%), cardiac procedures (190%), and mammography (240%). In order to progress from Level II to Level I status Malaysia needs to expand and upgrade radiological service in tandem with the health care development of the country.
    Matched MeSH terms: Radiography/statistics & numerical data*
  16. Samuel D
    Med J Malaysia, 1990 Dec;45(4):335-9.
    PMID: 2152056
    Two cases of longstanding foreign bodies in the larynx and lower laryngo-pharynx were accurately localised by direct coronal3 and limited axial CT scans of the neck. The relationship of the foreign bodies with the surrounding structures and associated changes are demonstrated clearly.
    Matched MeSH terms: Foreign Bodies/radiography*
  17. Dorai CRT
    Med J Malaysia, 1987 Jun;42(2):119-21.
    PMID: 3503184
    A case of limy bile, i.e. bile in the gall bladder rendered radio-opaque due to excessive concentration of calcium carbonate, is reported and its pathogenesis discussed.
    Matched MeSH terms: Cholelithiasis/radiography*
  18. Soo YS
    Med J Malaya, 1971 Jun;25(4):288-92.
    PMID: 4261303
    Matched MeSH terms: Angiomatosis/radiography*
  19. Anuar M, Ng KK, Chong KF
    Med J Malaysia, 1977 Mar;31(3):244-6.
    PMID: 904521
    Matched MeSH terms: Empty Sella Syndrome/radiography*
  20. Laurell N
    Sairaanhoitaja, 1975 Sep 9;50(17):32-4.
    PMID: 1043211
    Matched MeSH terms: Radiography*
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