MyMedR

Fulltext Gartner duct cyst in pregnancy presenting as a prolapsing pelvic mass

Arumugam A, Kumar G, Si L, Vijayananthan A

Biomed Imaging Interv J, 2007 Oct;3(4):e46.

PMID: 21614298 MyJurnal DOI: 10.2349/biij.3.4.e46

Gartner duct cysts are the remnants of the Wolffian duct and they are rarely seen in adulthood. We present a case of a pregnant patient with a prolapsing vaginal mass. A diagnosis of Gartner duct cyst was made after MRI was performed. The Gartner duct cyst was drained when the patient went into labour allowing vaginal delivery to be performed.

Fulltext Diffusion weighted MR imaging in acute vertebral compression fractures: differentiation between malignant and benign causes

Bhugaloo A, Abdullah B, Siow Y, Ng Kh

Biomed Imaging Interv J, 2006 Apr;2(2):e12.

PMID: 21614224 MyJurnal DOI: 10.2349/biij.2.2.e12

The primary objective of this study was to evaluate the specificity and sensitivity of diffusion weighted MR imaging (DWI) in the differentiation and characterisation between benign and malignant vertebral compression fractures compared with conventional T1 WI, T2 WI and fat suppressed contrast enhanced T1 WI in the Malaysian population.

Fulltext Increasing the speed of medical image processing in MatLab

Bister M, Yap C, Ng Kh, Tok Ch

Biomed Imaging Interv J, 2007 Jan;3(1):e9.

PMID: 21614269 DOI: 10.2349/biij.3.1.e9

MatLab(®) has often been considered an excellent environment for fast algorithm development but is generally perceived as slow and hence not fit for routine medical image processing, where large data sets are now available e.g., high-resolution CT image sets with typically hundreds of 512x512 slices. Yet, with proper programming practices - vectorization, pre-allocation and specialization - applications in MatLab(®) can run as fast as in C language. In this article, this point is illustrated with fast implementations of bilinear interpolation, watershed segmentation and volume rendering.

Fulltext Chest imaging features of patients afflicted with Influenza A (H1N1) in a Malaysian tertiary referral centre

Bux S, Mohd Ramli N, Ahmad Sarji S, Kamarulzaman A

Biomed Imaging Interv J, 2010 Oct-Dec;6(4):e35.

PMID: 21611071 MyJurnal DOI: 10.2349/biij.6.4.e35

This is a retrospective descriptive study of the chest imaging findings of 118 patients with confirmed A(H1N1) in a tertiary referral centre. About 42% of the patients had positive initial chest radiographic (CXR) findings. The common findings were bi-basal air-space opacities and perihilar reticular and alveolar infiltrates. In select cases, high-resolution computed tomography (CT) imaging showed ground-glass change with some widespread reticular changes and atelectasis.

Fulltext Evaluation of imaging performance of major image guidance systems

Chan M, Yang J, Song Y, Burman C, Chan P, Li S

Biomed Imaging Interv J, 2011 Apr;7(2):e11.

PMID: 22287985 DOI: 10.2349/biij.7.2.e11

PURPOSE: The imaging characteristics of two popular kV cone-beam CT (CBCT) and two MVCT systems utilised in image-guided radiation therapy (IGRT) were evaluated.

MATERIALS AND METHODS: The study was performed on Varian Clinac iX, Elekta Synergy S, Siemens Oncor, and Tomotherapy. A CT phantom (Catphan-504, Phantom Laboratory, Salem, NY) was scanned for measurements of image quality including image noise, uniformity, density accuracy, spatial resolution, contrast linearity, and contrast resolution. The measurement results were analysed using in-house image analysis software. Reproducibility, position correction, and geometric accuracy were also evaluated with markers in a smaller alignment phantom. The performance evaluation compared volumetric image properties from these four systems with those from a conventional diagnostic CT (CCT).

RESULTS: It was shown that the linearity of the two kV CBCT was fairly consistent with CCT. The Elekta CBCT with half-circle 27-cm FOV had higher CT numbers than the other three systems. The image noises of the Elekta kV CBCT, Siemens MV CBCT, and Tomotherapy fan-beam CT (FBCT) are about 2-4 times higher than that of the Varian CBCT. The spatial resolutions of two kV CBCTs and two MV CBCTs were 8-11 lp/cm and 3-5 lp/cm, respectively.

CONCLUSION: Elekta CBCT provided a faster image reconstruction and low dose per scan for half-circle scanning. Varian CBCT had relatively lower image noise. Tomotherapy FBCT had the best uniformity.

Fulltext Optimising the scan delay for arterial phase imaging of the liver using the bolus tracking technique

Chan R, Kumar G, Abdullah B, Ng Kh, Vijayananthan A, Mohd Nor H, et al.

Biomed Imaging Interv J, 2011 Apr;7(2):e12.

PMID: 22287986 MyJurnal DOI: 10.2349/biij.7.2.e12

To optimize the delay time before the initiation of arterial phase scan in the detection of focal liver lesions in contrast enhanced 5 phase liver CT using the bolus tracking technique.

Fulltext Radiofrequency ablation of a misdiagnosed Brodie's abscess

Chan R, Abdullah B, Aik S, Tok Ch

Biomed Imaging Interv J, 2011 Apr;7(2):e17.

PMID: 22291860 DOI: 10.2349/biij.7.2.e17

Radiofrequency ablation (RFA) therapy is recognised as a safe and effective treatment option for osteoid osteoma. This case report describes a 27-year-old man who underwent computed tomography (CT)-guided percutaneous RFA for a femoral osteoid osteoma, which was diagnosed based on his clinical presentation and CT findings. The patient developed worsening symptoms complicated by osteomyelitis after the procedure. His clinical progression and subsequent MRI findings had led to a revised diagnosis of a Brodie's abscess, which was further supported by the eventual resolution of his symptoms following a combination of antibiotics treatment and surgical irrigations. This case report illustrates the unusual MRI features of osteomyelitis mimicking soft tissue tumours following RFA of a misdiagnosed Brodie's abscess and highlights the importance of a confirmatory histopathological diagnosis for an osteoid osteoma prior to treatment.

Fulltext Induction chemotherapy with paclitaxel, ifosfamide, and cisplatin followed by concurrent chemoradiotherapy for unresectable locally advanced head and neck cancer

Chitapanarux I, Tharavichitkul E, Lorvidhaya V, Sittitrai P, Pattarasakulchai T

Biomed Imaging Interv J, 2010 07 01;6(3):e23.

PMID: 21611042 DOI: 10.2349/biij.6.3.e23

OBJECTIVE: Induction chemotherapy (IC) and concurrent chemoradiotherapy (CCRT) for locally advanced head and neck cancer has been studied in many clinical trials. This study was conducted to determine the response rate of IC with paclitaxel, ifosfamide, and cisplatin followed by CCRT with cisplatin for this group of patients, and the effect of the entire treatment on survival and time to disease progression.

METHODS: Thirty patients with advanced and unresectable head and neck cancer were treated with 2 cycles of induction paclitaxel/ ifosfamide/ cisplatin. If the primary tumor had a complete or partial response, patients were treated with 2 more cycles of IC followed by radiotherapy 70 Gy plus 3 cycles of cisplatin. For those with less than partial response or disease progression were treated according to the discretion of the physicians.

RESULTS: Ninety percent of patients had stage IV disease and 40% of them had primary tumor at maxillary sinus and nasal cavity. One patient (3%) achieved complete response (CR) and 18 patients had partial responses (PR) to IC. CCRT enhanced the response rate, resulting in a total of 3 CR (10%) and 16 PR (53%) to treatment. The median time to progression was 11.5 months. The median overall survival was 27 months. The most severe hematologic toxicity occurred during IC was grade3-4 neutropenia (40%). Grade 3-4 mucositis occurred in 68% of patients during CCRT.

CONCLUSION: This novel combined-modality treatment program, is toxic but feasible, and can be administered for selected patients with advanced and unresectable head and neck cancer. © 2010 Biomedical Imaging and Intervention Journal. All rights reserved.

Fulltext Use of new radiochromic devices for peripheral dose measurement: potential in-vivo dosimetry application

Chiu-Tsao ST, Chan M

Biomed Imaging Interv J, 2009 Oct;5(4):e16.

PMID: 21610987 DOI: 10.2349/biij.5.4.e16

The authors have studied the feasibility of using three new high-sensitivity radiochromic devices in measuring the doses to peripheral points outside the primary megavoltage photon beams. The three devices were GAFCHROMIC® EBT film, prototype Low Dose (LD) Film, and prototype LD Card. The authors performed point dosimetry using these three devices in water-equivalent solid phantoms at x = 3,5,8,10, and 15 cm from the edge of 6 MV and 15 MV photon beams of 10x10 cm(2), and at depths of 0, 0.5 cm, and depth of maximum dose. A full sheet of EBT film was exposed with 5000 MU. The prototype LD film pieces were 1.5x2 cm(2) in size. Some LD films were provided in the form of a card in 1.8x5 cm(2) holding an active film in 1.8x2 cm(2). These are referred to as "LD dosimeter cards". The small LD films and cards were exposed with 500 MU. For each scanned film, a 6 mm circular area centered at the measurement point was sampled and the mean pixel value was obtained. The calibration curves were established from the calibration data for each combination of film/cards and densitometer/scanner. The doses at the peripheral points determined from the films were compared with those obtained using ion chamber at respective locations in a water phantom and general agreements were found. It is feasible to accurately measure peripheral doses of megavoltage photon beams using the new high-sensitivity radiochromic devices. This near real-time and inexpensive method can be applied in a clinical setting for dose measurements to critical organs and sensitive patient implant devices.

Fulltext Role of radiosynovectomy in the treatment of rheumatoid arthritis and hemophilic arthropathies

Das B

Biomed Imaging Interv J, 2007 Oct;3(4):e45.

PMID: 21614297 DOI: 10.2349/biij.3.4.e45

Radiosynovectomy is a novel method of treatment for several acute and chronic inflammatory joint disorders. A small amount of a beta-emitting radionuclide is injected into the affected joint delivering a radiation dose of 70 to 100 Gy to the synovia. The proliferative tissue is destroyed, secretion of fluid and accumulation of inflammation causing cellular compounds stops and the joint surfaces become fibrosed, providing long term symptom relief. The radionuclides are injected in colloidal form so that they remain in the synovium and are not transported by lymphatic vessels causing radiation exposure to other organs. Complete reduction of knee joint swelling has been seen in above 40% and pain relief in 88% of patients. Wrist, elbow, shoulder, ankle and hip joints showed significant improvement in 50-60% and restoration of normal function and long term pain relief has been achieved in about 70% of small finger joints. In hemophilic arthropathies complete cessation of bleeding in about 60% and improved mobility in 75% of patients has been reported.

Fulltext Echocontrast cystosonography versus micturating cystourethrography in the detection of vesicoureteric reflux

Faizah M, Kanaheswari Y, Thambidorai C, Zulfiqar M

Biomed Imaging Interv J, 2011 Jan-Mar;7(1):e7.

PMID: 21655116 MyJurnal DOI: 10.2349/biij.7.1.e7

To compare echocontrast cystosonography (ECS) using in-vivo agitated saline with fluoroscopic micturating cystourethrography (MCU) in the detection and grading of vesicoureteric reflux (VUR).

Fulltext Precocious puberty in children: A review of imaging findings

Faizah M, Zuhanis A, Rahmah R, Raja A, Wu L, Dayang A, et al.

Biomed Imaging Interv J, 2012 Jan;8(1):e6.

PMID: 22970062 MyJurnal DOI: 10.2349/biij.8.1.e6

This review was aimed at determining the imaging findings in patients with precocious puberty.

Fulltext Improved fracture detection using the mammographic film-screen combination

Faridah Y, Abdullah B, Ng Kh

Biomed Imaging Interv J, 2005 Jul;1(1):e3.

PMID: 21625275 DOI: 10.2349/biij.1.1.e3

The single emulsion or single screen system is usually reserved for mammography since its use in general radiography is limited. The purpose of this study is to compare the mammographic film-screen combination (MFC) and the standard film-screen combination (SFC) in terms of fracture and soft tissue injuries detection. PATIENTS, METHODS AND MATERIALS: In this prospective study, 41 patients from Accident and Emergency suspected of having injury in the hands, wrists, ankles and feet regions were radiographed using both MFC and SFC. These were compared in terms of image quality, presence of fractures and soft tissue injuries. The two different film-screen combinations were also compared in terms of detection of bony fragments, film characteristics such as film speed, contrast and spatial resolution, dose and cost.

Fulltext Digital versus screen film mammography: a clinical comparison

Faridah Y

Biomed Imaging Interv J, 2008 Oct;4(4):e31.

PMID: 21611016 MyJurnal DOI: 10.2349/biij.4.4.e31

Fulltext F-FDG PET/CT as a potential valuable adjunct to MRI in characterising the Brodie's abscess

Fathinul F, Nordin A

Biomed Imaging Interv J, 2010 07 01;6(3):e26.

PMID: 21611044 DOI: 10.2349/biij.6.3.e26

Chronic osteomyelitis (Brodie's abscess) is essentially a problem of diagnosis, and there may be considerable difficulty in distinguishing it from other benign and malignant bone lesions. Early diagnosis of Brodie's abscess is deemed important as the disease has a good curative potential following an appropriate antibiotic treatment. Of late, PET/CT using (18)F-FDG is taking a centre stage in the imaging of bone infection though documentation on its role in characterising the feature of Brodie's abscess is exceedingly scarce. On the other hand, it is well known that MRI imaging plays a very important role in distinguishing abscess loculation from malignancy. The authors present the case of a 13-year-old boy with pain in the right heel for few months. Radiograph of the right foot revealed a lucent focus with sclerotic margin in the right calcaneum. MRI T1-weighted images were inconclusive of penumbra sign to characterise abscess cavity due to the small volume lesion. Whole-body (18)F-FDG PET/CT scan showed multiple small avid lesions at the margin of the sclerotic rim in the right calcaneum. Final diagnosis of Brodie's abscess with Klebsiella culture was confirmed via bone debridement.

Fulltext An intense F-FDG pulmonary microfocus on PET without detectable abnormality on CT: A manifestation of an iatrogenic FDG pulmonary embolus

Fathinul Fikri A, Lau W

Biomed Imaging Interv J, 2010 10 01;6(4):e37.

PMID: 21611073 DOI: 10.2349/biij.6.4.e37

An incidental finding of an intense focus of (18)F-Fluorodeoxyglucose (FDG) pulmonary uptake on positron emission tomography (PET) without detectable lesions on computed tomography (CT) is highly suggestive of FDG microembolus. Its microscopic nature means it is undetectable on CT. It is an artefact attributable to (18)F-FDG-tracer contamination at the injection site. This paper reports a case of a 61 year-old lady with a past history of breast carcinoma, in whom follow-up PET/CT images demonstrated an incidental intense FDG pulmonary abnormality. A follow-up PET/CT seven months later demonstrated complete resolution of the abnormality.

Fulltext Significance of subcentimetre F-FDG PET/CT pulmonary abnormality in patients with known extrapulmonary malignancy

Fathinul Fikri A, Lau W

Biomed Imaging Interv J, 2010 10 01;6(4):e34.

PMID: 21611070 DOI: 10.2349/biij.6.4.e34

The significance of a subcentimetre (18)F-FDG PET/CT pulmonary abnormality in a patient with known extrapulmonary primary malignancy can have a major impact on the clinical management of the patient. The clinician's reliance on the semi-quantitative and qualitative PET/CT analysis of the abnormality has, at times, led to untoward diagnostic problems, given the limited spatial resolution of PET for a small volume lesion performed as part of the standard PET/CT study. This paper highlights a case each of an FDG-positive and an FDG-negative focal pulmonary abnormality in a combined PET/CT study of patients with known extrapulmonary malignancy. © 2010 Biomedical Imaging and Intervention Journal. All rights reserved.

Fulltext Effective connectivity between superior temporal gyrus and Heschl's gyrus during white noise listening: linear versus non-linear models

Hamid K, Yusoff A, Rahman M, Mohamad M, Hamid A

Biomed Imaging Interv J, 2012 Apr;8(2):e13.

PMID: 22970069 MyJurnal DOI: 10.2349/biij.8.2.e13

This fMRI study is about modelling the effective connectivity between Heschl's gyrus (HG) and the superior temporal gyrus (STG) in human primary auditory cortices. MATERIALS #ENTITYSTARTX00026;

Fulltext The surgical management of obesity with emphasis on the role of post operative imaging

Hampson F, Sinclair M, Smith S

Biomed Imaging Interv J, 2011 01 01;7(1):e8.

PMID: 21655117 DOI: 10.2349/biij.7.1.e8

The role of surgery in the morbidly obese is becoming more prominent. There are a variety of surgical approaches which can be used and radiology plays a crucial role in post operative follow up, particularly in the management of complications. Many general radiologists remain unfamiliar with both the normal and abnormal appearances after bariatric surgery and this pictorial review aims to bridge this gap.

Fulltext Epidural haemorrhage during embolisation: a rare complication of intra-arterial embolisation of vertebral metastases

Hashim H, Abdul Kadir K

Biomed Imaging Interv J, 2011 Oct;7(4):e26.

PMID: 22279503 MyJurnal DOI: 10.2349/biij.7.4.e26

Pre-operative embolisation of vertebral metastases has been known to effectively devascularise hypervascular vertebral tumours and to reduce intra-operative bleeding. However, the complications that occur during the procedure are rarely reported. This case study attempts to highlight one rare complication, which is epidural tumoural haemorrhage intra-procedure. It may occur due to the fragility of the tumour and presence of neovascularisation. A small arterial dissection may also have occurred due to a slightly higher pressure exerted during injection of embolising agent. Haemostasis was secured via injection of Histoacryl into the area of haemorrhage. The patient was able to undergo the decompression surgery and suffered no direct complication from the haemorrhage.

Displaying publications 21 - 40 of 104 in total