MyMedR

Displaying publications 221 - 240 of 561 in total

Abstract:

Sort:

Fulltext Cotton-ball granuloma mimicking axillary lymphadenopathy in a breast cancer patient

Hashim H, Alli K, Faridah Y, Rahmat K

Biomed Imaging Interv J, 2011 07 01;7(3):e19.
PMID: 22279496 MyJurnal DOI: 10.2349/biij.7.3.e19

Foreign body granuloma is a reaction to either a biodegradable substance or inert material. In a breast cancer patient who had undergone an excision or mastectomy with axillary clearance, a foreign body granuloma in the axilla may be misinterpreted as an axillary lymph node. We report our experience with a case of cotton-ball granuloma of the axilla in a breast cancer patient, which mimics a lymph node radiologically from the CT scan, mammogram and ultrasonography. Following biopsy and excision, the mass was diagnosed histologically as a foreign body granuloma.

Matched MeSH terms: Ultrasonography
Fulltext Accuracy of ultrasound versus computed tomography urogram in detecting urinary tract calculi

Salinawati B, Hing EY, Fam XI, Zulfiqar MA

Med J Malaysia, 2015 Aug;70(4):238-42.
PMID: 26358021 MyJurnal

AIM: To determine the (i) sensitivity and specificity of ultrasound (USG) in the detection of urinary tract calculi, (ii) size of renal calculi detected on USG, and (iii) size of renal calculi not seen on USG but detected on computed tomography urogram (CTU).
METHODS: A total of 201 patients' USG and CTU were compared retrospectively for the presence of calculi. Sensitivity, specificity, accuracy, positive predictive value and negative predictive value of USG were calculated with CTU as the gold standard.
RESULTS: From the 201 sets of data collected, 59 calculi were detected on both USG and CTU. The sensitivity and specificity of renal calculi detection on USG were 53% and 85% respectively. The mean size of the renal calculus detected on USG was 7.6 mm ± 4.1 mm and the mean size of the renal calculus not visualised on USG but detected on CTU was 4 mm ± 2.4 mm. The sensitivity and specificity of ureteric calculi detection on USG were 12% and 97% respectively. The sensitivity and specificity of urinary bladder calculi detection on USG were 20% and 100% respectively.
CONCLUSION: This study showed that the accuracy of US in detecting renal, ureteric and urinary bladder calculi were 67%, 80% and 98% respectively.
Study site: Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur

Matched MeSH terms: Ultrasonography
An integrated index for automated detection of infarcted myocardium from cross-sectional echocardiograms using texton-based features (Part 1)

Sudarshan VK, Acharya UR, Ng EY, Tan RS, Chou SM, Ghista DN

Comput Biol Med, 2016 Apr 1;71:231-40.
PMID: 26898671 DOI: 10.1016/j.compbiomed.2016.01.028

Cross-sectional view echocardiography is an efficient non-invasive diagnostic tool for characterizing Myocardial Infarction (MI) and stages of expansion leading to heart failure. An automated computer-aided technique of cross-sectional echocardiography feature assessment can aid clinicians in early and more reliable detection of MI patients before subsequent catastrophic post-MI medical conditions. Therefore, this paper proposes a novel Myocardial Infarction Index (MII) to discriminate infarcted and normal myocardium using features extracted from apical cross-sectional views of echocardiograms. The cross-sectional view of normal and MI echocardiography images are represented as textons using Maximum Responses (MR8) filter banks. Fractal Dimension (FD), Higher-Order Statistics (HOS), Hu's moments, Gabor Transform features, Fuzzy Entropy (FEnt), Energy, Local binary Pattern (LBP), Renyi's Entropy (REnt), Shannon's Entropy (ShEnt), and Kapur's Entropy (KEnt) features are extracted from textons. These features are ranked using t-test and fuzzy Max-Relevancy and Min-Redundancy (mRMR) ranking methods. Then, combinations of highly ranked features are used in the formulation and development of an integrated MII. This calculated novel MII is used to accurately and quickly detect infarcted myocardium by using one numerical value. Also, the highly ranked features are subjected to classification using different classifiers for the characterization of normal and MI LV ultrasound images using a minimum number of features. Our current technique is able to characterize MI with an average accuracy of 94.37%, sensitivity of 91.25% and specificity of 97.50% with 8 apical four chambers view features extracted from only single frame per patient making this a more reliable and accurate classification.

Matched MeSH terms: Ultrasonography
Fulltext Incorporating texture features in a computer-aided breast lesion diagnosis system for automated three-dimensional breast ultrasound

Liu H, Tan T, van Zelst J, Mann R, Karssemeijer N, Platel B

J Med Imaging (Bellingham), 2014 Jul;1(2):024501.
PMID: 26158036 DOI: 10.1117/1.JMI.1.2.024501

We investigated the benefits of incorporating texture features into an existing computer-aided diagnosis (CAD) system for classifying benign and malignant lesions in automated three-dimensional breast ultrasound images. The existing system takes into account 11 different features, describing different lesion properties; however, it does not include texture features. In this work, we expand the system by including texture features based on local binary patterns, gray level co-occurrence matrices, and Gabor filters computed from each lesion to be diagnosed. To deal with the resulting large number of features, we proposed a combination of feature-oriented classifiers combining each group of texture features into a single likelihood, resulting in three additional features used for the final classification. The classification was performed using support vector machine classifiers, and the evaluation was done with 10-fold cross validation on a dataset containing 424 lesions (239 benign and 185 malignant lesions). We compared the classification performance of the CAD system with and without texture features. The area under the receiver operating characteristic curve increased from 0.90 to 0.91 after adding texture features ([Formula: see text]).

Matched MeSH terms: Ultrasonography, Mammary
Optimization of ultrasound-assisted extraction of pectinase enzyme from guava (Psidium guajava) peel: Enzyme recovery, specific activity, temperature, and storage stability

Amid M, Murshid FS, Manap MY, Islam Sarker Z

Prep Biochem Biotechnol, 2016;46(1):91-9.
PMID: 25844554 DOI: 10.1080/10826068.2015.1031396

This study aimed to investigate the effects of the ultrasound-assisted extraction conditions on the yield, specific activity, temperature, and storage stability of the pectinase enzyme from guava peel. The ultrasound variables studied were sonication time (10-30 min), ultrasound temperature (30-50 °C), pH (2.0-8.0), and solvent-to-sample ratio (2:1 mL/g to 6:1 mL/g). The main goal was to optimize the ultrasound-assisted extraction conditions to maximize the recovery of pectinase from guava peel with the most desirable enzyme-specific activity and stability. Under the optimum conditions, a high yield (96.2%), good specific activity (18.2 U/mg), temperature stability (88.3%), and storage stability (90.3%) of the extracted enzyme were achieved. The optimal conditions were 20 min sonication time, 40 °C temperature, at pH 5.0, using a 4:1 mL/g solvent-to-sample ratio. The study demonstrated that optimization of ultrasound-assisted process conditions for the enzyme extraction could improve the enzymatic characteristics and yield of the enzyme.

Matched MeSH terms: Ultrasonography
Relationship between fetal femur diaphysis length and neonatal crown-heel length: the effect of race

Lim JM, Hong AG, Raman S, Shyamala N

Ultrasound Obstet Gynecol, 2000 Feb;15(2):131-7.
PMID: 10775996

To determine whether racial differences affect the relationship between the fetal femur diaphysis length and the neonatal crown-heel length.

Matched MeSH terms: Femur/ultrasonography*; Ultrasonography, Prenatal/methods*
Bilateral internal jugular vein ectasia: a report of two cases

Gendeh BS, Dhillon MK, Hamzah M

J Laryngol Otol, 1994 Mar;108(3):256-60.
PMID: 8169515

Internal jugular vein ectasia is a venous anomaly commonly presenting as a unilateral neck swelling in children and adults. Literature reports of bilateral presentation are rare. Bilateral Doppler ultrasonography is the diagnostic investigation of choice. The possible pathology, aetiology and management are discussed. Conservative management of bilateral cases is recommended in uncomplicated cases.

Matched MeSH terms: Ultrasonography
Prenatal diagnosis of a posterior fossa cyst

Raman S, Rachagan SP, Lim CT

J Clin Ultrasound, 1991 Sep;19(7):434-7.
PMID: 1658071
Matched MeSH terms: Ultrasonography, Prenatal
Fulltext Prospective evaluation of using multiparametric magnetic resonance imaging in cognitive fusion prostate biopsy compared to the standard systematic 12-core biopsy in the detection of prostate cancer

Lim LY, Tan GH, Zainuddin ZM, Fam XI, Goh EH, Syaris OS, et al.

Urol Ann, 2020 07 17;12(3):276-282.
PMID: 33100755 DOI: 10.4103/UA.UA_98_19

Purpose: There is mounting evidence to suggest that multiparametric magnetic resonance imaging (mpMRI)-guided biopsy is better than systematic biopsy for the diagnosis of prostate cancer (PCa). Cognitive fusion biopsy (CFB) involves targeted biopsies of areas of suspicious lesions noted on the mpMRI by transrectal ultrasound (TRUS) operator. This study was undertaken to determine the accuracy of mpMRI of the prostate with Prostate Imaging-Reporting and Data System (PI-RADS) version 2 in detecting PCa. We also compare the cancer detection rates between systematic 12-core TRUS biopsy and CFB.
Materials and Methods: Sixty-nine men underwent mpMRI of the prostate followed by TRUS biopsy. In addition to 12-core biopsy, CFB was performed on abnormal lesions detected on MRI.
Results: Abnormal lesions were identified in 98.6% of the patients, and 59.4% had the highest PI-RADS score of 3 or more. With the use of PI-RADS 3 as cutoff, the sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of MRI for the detection of PCa were 91.7%, 57.8%, 53.7%, and 92.8%, respectively. With the use of PI-RADS 4 as cutoff, the sensitivity, specificity, PPV, and NPV of mpMRI were 66.7%, 91.1%, 80%, and 83.7%, respectively. Systematic biopsy detected more PCa compared to CFB (29% vs. 26.1%), but CFB detected more significant (Gleason grade ≥7) PCa (17.4% vs. 14.5%) (P < 0.01). CFB cores have a higher PCa detection rate as compared to systematic cores (P < 0.01).
Conclusions: mpMRI has a good predictive ability for PCa. CFB is superior to systematic biopsy in the detection of the significant PCa.

Matched MeSH terms: Ultrasonography
Fulltext Lymphoma presenting as gynaecomastia

Mahmood S, Sabih Z, Sabih D

Biomed Imaging Interv J, 2011 Apr;7(2):e10.
PMID: 22287984 DOI: 10.2349/biij.7.2.e10

Breast lymphoma is an uncommon neoplasm affecting the breast and is extremely rare in males. While gynaecomastia is common and in most cases benign, it can sometimes result from significant pathology and the physician should keep in mind the possible diseases that can lead to gynaecomastia. This paper reports a case of lymphoma presenting as unilateral gynaecomastia. The paper discusses the differential diagnosis and emphasises the points that should raise the suspicion of pathology.Mammography, high resolution ultrasound and biopsy findings are discussed and literature survey is presented.

Matched MeSH terms: Ultrasonography
Scrotal emergencies: An imaging perspective

Ong CYG, Low HM, Chinchure D

Med J Malaysia, 2018 12;73(6):445-451.
PMID: 30647231

Acute scrotal pain is a common complaint in emergency or primary care practice. A myriad of pathologies need to be considered, and while the clinical history often leads the clinician to the correct diagnosis, radiologists are often called upon to provide further diagnostic information through ultrasonography. Here, we present the sonographic features of various scrotal emergencies, as well as a few pitfalls. Through this, we explore the breadth of urgent pathologies that may be encountered, both traumatic and non-traumatic. For the clinician who performs point-of-care ultrasound, whether in clinic or in the emergency department, we hope that this pictorial article will lay a good foundation for confident and accurate image interpretation.

Matched MeSH terms: Ultrasonography
Fulltext A New Approach for Testing Fetal Heart Rate Monitors

Bibbo D, Klinkovsky T, Penhaker M, Kudrna P, Peter L, Augustynek M, et al.

Sensors (Basel), 2020 Jul 25;20(15).
PMID: 32722397 DOI: 10.3390/s20154139

In this paper, a new approach for the periodical testing and the functionality evaluation of a fetal heart rate monitor device based on ultrasound principle is proposed. The design and realization of the device are presented, together with the description of its features and functioning tests. In the designed device, a relay element, driven by an electric signal that allows switching at two specific frequencies, is used to simulate the fetus and the mother's heartbeat. The simulator was designed to be compliant with the standard requirements for accurate assessment and measurement of medical devices. The accuracy of the simulated signals was evaluated, and it resulted to be stable and reliable. The generated frequencies show an error of about 0.5% with respect to the nominal one while the accuracy of the test equipment was within ±3% of the test signal set frequency. This value complies with the technical standard for the accuracy of fetal heart rate monitor devices. Moreover, the performed tests and measurements show the correct functionality of the developed simulator. The proposed equipment and testing respect the technical requirements for medical devices. The features of the proposed device make it simple and quick in testing a fetal heart rate monitor, thus providing an efficient way to evaluate and test the correlation capabilities of commercial apparatuses.

Matched MeSH terms: Ultrasonography
Fulltext Recent Advances in Breast Cancer Diagnosis Entering an Era of Precision Medicine

Lim, Christopher, Mra, Aung, Chin, Suliong, Venkata Rao, Challa, Aung, Tun, Sieman, Jony, et al.

Borneo Journal of Medical Sciences, 2019;13(1):3-9.
MyJurnal

This article will cover some of the most recent advances in the diagnosis of the world’s most common cancer in women, namely, breast cancer as we enter the era of precision medicine. The authors will discuss the differences between East and West pertaining to the incidence and mortality rates, the types of breast cancer and the revised staging criteria of breast cancer according to the American Joint Committee on Cancer (AJCC) Staging Manual, 8th edition. In addition, the advances of newer imaging modalities are presented and compared with traditional ultrasonography and mammography

Matched MeSH terms: Ultrasonography
Fulltext Streptococcus pneumoniae Meningitis and Intracranial Vasculopathy: Clinical Correlation with Improving Transcranial Doppler Hemodynamics

Idris MI, Tai SML, Tan CT, Tan KS

Case Rep Neurol, 2020 12 14;12(Suppl 1):106-109.
PMID: 33505281 DOI: 10.1159/000500950

Streptococcus pneumoniae are Gram-positive bacteria that are responsible for many types of illnesses including pneumonia, sinus infections, and community-acquired meningitis. One important complication of bacterial meningitis is intracranial vasculopathy. Possible etiologies include vasculitis, vasospasm, endocarditis, or intra-arterial thrombosis. We present a case report of S. pneumoniae meningitis treated with antibiotics in which clinical improvement correlated with serial transcranial Doppler ultrasonography (TCD) improvement, suggesting vasospasm or vasculitis as a possible mechanism for intracranial vasculopathy.

Matched MeSH terms: Ultrasonography, Doppler, Transcranial
Obstructed jejunal duplication cyst in an infant

Ho CK

Med J Malaysia, 2020 03;75(2):167-168.
PMID: 32281600

Intestinal obstruction in infancy due to duplication cyst is rare. This is a case of a three-month old boy presented to the hospital with symptoms and signs of intermittent intestinal obstruction for three-week duration. Investigation with ultrasound revealed a small bowel duplication cyst. Patient underwent successful segmental jejunal resection and made an uneventful recovery. He made significant weight gain at one-year follow-up. The diagnostic approach to infant with intestinal obstruction is described with special emphasis on ultrasonographic features of jejunal duplication cyst.

Matched MeSH terms: Ultrasonography
Fulltext Non-Traumatic Snapping Tendon on the Dorsal Aspect of the Thumb: A Diagnostic Challenge

Kesu Belani L, Abdullah S, Soh EZF, Abd Jabar F, Nasseri Z

Cureus, 2021 Apr 11;13(4):e14417.
PMID: 33987066 DOI: 10.7759/cureus.14417

A snapping tendon on the dorsal aspect of the thumb is a rare condition as opposed to the common triggering on the volar aspect of the thumb. This condition is known as triggering of the extensor pollicis longus (EPL). A 21-year-old female presented with a clicking or snapping sensation that was felt on the dorsum of her thumb when it is extended. There was no history of trauma. She worked in an ice-cream parlor with repetitive scooping ice-cream motions. Her triggering immediately resolved on releasing the EPL fascia ulnar to Lister's tubercle. Upon wake-up surgery, we could immediately confirm this. We recommend dynamic ultrasound as an investigation and do not recommend MRI. The surgical method of choice is either wake-up surgery or wide-awake local anesthesia no tourniquet (WALANT) surgery.

Matched MeSH terms: Ultrasonography
Imaging bicipitoradial bursitis: a pictorial essay

Yap SH, Griffith JF, Lee RKL

Skeletal Radiol, 2019 Jan;48(1):5-10.
PMID: 29797016 DOI: 10.1007/s00256-018-2970-0

Although bicipitoradial bursitis is not commonly seen, when it does occur, it can frequently lead to diagnostic difficulty, mimicking either a soft-tissue tumor or infection. Lack of awareness of this uncommon entity can lead to unnecessary anxiety or tissue biopsy. This pictorial essay discusses the normal anatomy of the bicipitoradial bursa and the spectrum of imaging findings of bicipital bursitis.

Matched MeSH terms: Ultrasonography
Fulltext Widespread pandemic, wide-ranging response: student-led virtual telemedicine and digital community-based healthcare provision in a university healthcare centre in response to coronavirus quarantine measures

Muhammad Syafiq Abdullah, Nicholas Pang, Sharinah Abd Kassim, Flora Aurora AmatUdat, NurZiana Ulkaya, NuraisyahNurullah, et al.

Malaysian Journal of Medicine and Health Sciences, 2020;16(105):13-0.
MyJurnal

Introduction: Isolation and border control measures, with home quarantine measures, are essential to stem the spread of the newly emergent novel Covid-19. Such measures are doomed to fail if reliant on traditional isolation methods, which entail small numbers of overworked healthcare staff screening and surveilling large numbers of well individuals who are potential false positives. Innovative method employed by Hospital UMS to overcome these logistics difficulties. Methods: A total of 440 returning China students to UMS were planned for home quarantine measures for 14 days. In the intervening 14 days, groups of ten quarantined individuals were assigned to 1 Manda- rin-speaking medical student liaison officer (LO). LOs performed assessment toolkit for 14 consecutive days virtually via WhatsApp and WeChat and reported back to NCOV central command if any symptoms ensued. Results: 45 China students have been put on home quarantine. Two (2) students with symptoms were monitored virtually till resolution of symptoms. Also, five (5) students with uncontactable phone numbers required tracking down, using var- ious methods eg: retrieval from close contacts through wide-bore virtual search. No cases so far have been positive for NCOV or have required referral to tertiary hospitals. Qualitatively, such methods are a vital public health inter- vention, as task shifting happens to semi-professionals. Hospital UMS first trial of two cherished founding principles: community-based rather than healthcare-facility center healthcare delivery, and judicious use of digital health com- munications, applications, and rudimentary telemedicine. Conclusion: Student-led virtual telemedicine and digital health delivery has potential in public health crises like NCOV, freeing frontline healthcare staff to devote energies to their specialties of screening and treatment. Integration of video and biometrics to incorporate true telemedicine, allowing individuals to be “hospitalized” in a community setting in situations of low risk.

Matched MeSH terms: Ultrasonography
Fulltext Transverse cerebellar diameter as a sonographic parameter for estimating gestational age: an experience from Yemeni population

Muneera A. S. Yahya, Husni A. Al- Goshae, Hameed M. Aklan, Maha Abdul-aziz, Abdullah A. Al-Mikhlafy

Malaysian Journal of Medicine and Health Sciences, 2020;16(107):23-27.
MyJurnal

Introduction: Estimation of gestational age (GA) is clinically crucial for managing pregnancy and assessing the foetal anatomy, growth and development. Transverse cerebellar diameter (TCD) has been reported as an accurate tool for dating the pregnancy. This study aimed to determine the accuracy of foetal TCD for dating the pregnancy and to con- struct a reference chart for GA of Yemeni foetuses. Methods: We conducted this prospective cross-sectional study among 400 Yemeni pregnant women between 18 and 40 weeks of gestation provided that they were with known last menstrual period and singleton normal pregnancies. Sonographic TCDs were measured for each foetus. The mean TCD was measured for gestational weeks separately, and a polynomial regression model was then used to predict the GA by TCD. Results: There was a robust correlation between GA and TCD (r = 0.995, p

Matched MeSH terms: Ultrasonography
Fulltext Frequency of gallbladder stones among patients underwent abdominal ultrasound in a tertiary hospital in Sana’a City, Yemen

Hameed M. Aklan, Abdullah A. S. A. Esmail, Abdulrahman A. Al-Sadeq, Gebreel A. Eissa, Osamah A. Hassan, Abdullah A. Al-Mikhlafy, et al.

Malaysian Journal of Medicine and Health Sciences, 2020;16(107):36-39.
MyJurnal

Introduction: The Gallbladder stone (GBS) disease is most commonly asymptomatic that may lead to several complications such as ascending cholangitis and obstructive jaundice. In this study the frequency of gallblad- der stones among patients referred for abdominal ultrasound at the University of Science and Technology hospital (USTH), Sana’a – Yemen, have been estimated during the period between January and June 2013. Methods: This study is a record-based and conducted at the radiology department in USTH, on cases underwent abdominal ultrasound during the period from January – June 2013. Information were collected from abdominal ultrasonography reports. Results: In this study 4935 patients’ records are included. Of them, 2541 were males and 2394 were females. The frequency of patients with GBS was 5.53%. Multiple stones were observed in 3.57% of patients and 4.34% patients had large stones with size  5 mm. Females had significantly higher frequency of GBS (8.0%: 191/2394) than males (3.2%: 82/2541) (P < 0.001). It was found that, no significant difference between males and females in harboring small stones (< 5mm) (P = 0.251). However, significantly higher frequency of large GBS ( 5 mm) was found among females compared to males (P < 0.001). The frequencies of GBS, small size of GBS and large size of GBS have significantly increased with increasing age (P < 0.001). Conclusion: In this study it was found that females had significantly higher frequency of GBS than males. No significant difference between males and females in harboring small stones. There was a significantly higher frequency of large GBS was found among females compared to males. The frequencies of GBS, small size of GBS and large size of GBS have significantly increased with increasing age.

Matched MeSH terms: Ultrasonography

Filters

Please provide feedback to Administrator (afdal@afpm.org.my)

External Links