MyMedR

Computerized tomographic measurement of the cervical pedicles diameter in a Malaysian population and the feasibility for transpedicular fixation

Yusof MI, Ming LK, Abdullah MS, Yusof AH

Spine (Phila Pa 1976), 2006 Apr 15;31(8):E221-4.

PMID: 16622365

The cervical pedicle diameter size differs between Asians and non-Asians. The authors studied the transverse pedicle diameter of the C2-C7 of the cervical spine in a Malaysian population using computerized tomography (CT) measurements. The transverse diameter of the pedicle is the determinant of the feasibility of this technique because the sagittal diameter of the pedicle has been wider than the transverse pedicle diameter.

Matched MeSH terms: Tomography, X-Ray Computed*

Fulltext Feasibility and accuracy of 64-row MDCT coronary imaging from a centre with early experience: a review and comparison with established centres

Ong TK, Chin SP, Chan WL, Liew CK, Seyfarth MT, Liew HB, et al.

Med J Malaysia, 2005 Dec;60(5):629-36.

PMID: 16515115

The accuracy of multi-detector computed tomographic (MDCI) coronary angiography (CTA) is dependant on image quality as well as the experience of the operator. Established centers have reported negative predictive values of over 95%. The aim of our study was to investigate the accuracy and feasibility of CTA for the assessment of haemodynamically significant coronary stenosis in a center with very early experience (<6 months) utilizing the improved spatial and temporal resolutions of the latest generation 64-row MDCI scanner. One hundred and twenty eight patients (93 male, 35 female; mean age 56.2 +/- 9.5 years) with suspected or known coronary artery disease underwent both CIA and conventional coronary angiographv (CCA). The sensitivity, specificity, positive (PPV) and negative (NPV) predictive values for stenoses > or =50% by CIA compared to CCA were 70%, 97%, 70% and 97% respectively. Evaluation of main and proximal segments in patients with good quality images (78% of patients) produced values of 94%, 95%, 74% and 99% respectively. The improved spatial and temporal resolutions of 64-row MJ) CT provided a high negative predictive value in assessing significant coronary artery stenosis even in a centre with very early experience. However, new centers embarking on CTA might not be able to reproduce the results reported by more experienced centers.

Matched MeSH terms: Tomography, X-Ray Computed*

Computed tomographic morphometry of thoracic pedicles: safety margin of transpedicular screw fixation in malaysian malay population

Liau KM, Yusof MI, Abdullah MS, Abdullah S, Yusof AH

Spine (Phila Pa 1976), 2006 Jul 15;31(16):E545-50.

PMID: 16845341

A cross-sectional study of thoracic pedicle morphometry (T1-T12) of 180 Malaysian Malay patients obtained from computed tomographic scan.

Matched MeSH terms: Tomography, X-Ray Computed*

Vascular tumours disguising as solid organ injuries on computed tomography: a report of two cases

Chan KY, Yoong CK, Naqiyah I, Norlia A

Nepal Med Coll J, 2004 Dec;6(2):152-3.

PMID: 16295751

We report two cases of uncommon vascular lesions (Littoral cell angioma and liver haemangioma) mimicking traumatic organ injuries. The patients' histories and clinical findings of trauma were well demonstrated. Both patients had interesting CT scan features that were suggestive of solid organ injuries. However, both conditions were subsequently found to be benign incidental lesions.

Matched MeSH terms: Tomography, X-Ray Computed*

MRI and CT findings of cryptococcal vaginitis

Ranganathan S, Moosa F, Kamarulzaman A, Looi LM

Br J Radiol, 2005 Apr;78(928):353-4.

PMID: 15774599

Cryptococcus neoformans is a yeast like fungus, which is commonly found in bird droppings, especially pigeons. Most cases of cryptococcal infections occur in immunocompromised patients or in those who are on long term immunosuppressant therapies. Cryptococcal infection usually presents as a meningoencephalitis or a pulmonary infection. Skin, bone and genital infections are very rare. We report the second case of vaginal cryptococcossis to be reported in English literature and the first to be imaged with CT and MRI.

Matched MeSH terms: Tomography, X-Ray Computed/methods

Fulltext Surface Reconstruction from Parallel Curves with Application to Parietal Bone Fracture Reconstruction

Majeed A, Mt Piah AR, Ridzuan Yahya Z

PLoS One, 2016;11(3):e0149921.

PMID: 26967643 DOI: 10.1371/journal.pone.0149921

Maxillofacial trauma are common, secondary to road traffic accident, sports injury, falls and require sophisticated radiological imaging to precisely diagnose. A direct surgical reconstruction is complex and require clinical expertise. Bio-modelling helps in reconstructing surface model from 2D contours. In this manuscript we have constructed the 3D surface using 2D Computerized Tomography (CT) scan contours. The fracture part of the cranial vault are reconstructed using GC1 rational cubic Ball curve with three free parameters, later the 2D contours are flipped into 3D with equidistant z component. The constructed surface is represented by contours blending interpolant. At the end of this manuscript a case report of parietal bone fracture is also illustrated by employing this method with a Graphical User Interface (GUI) illustration.

Matched MeSH terms: Tomography, X-Ray Computed/methods

Proptosis--Correlation and Agreement between Hertel Exophthalmometry and Computed Tomography

Ramli N, Kala S, Samsudin A, Rahmat K, Abidin ZZ

Orbit, 2015;34(5):257-62.

PMID: 26186249 DOI: 10.3109/01676830.2015.1057291

To determine the correlation and agreement between Hertel exophthalmometry and computed tomography (CT) of the orbits in measuring proptosis.

Matched MeSH terms: Tomography, X-Ray Computed/methods*

Fulltext 3D multimodal cardiac data reconstruction using angiography and computerized tomographic angiography registration

Moosavi Tayebi R, Wirza R, Sulaiman PS, Dimon MZ, Khalid F, Al-Surmi A, et al.

J Cardiothorac Surg, 2015;10:58.

PMID: 25896185 DOI: 10.1186/s13019-015-0249-2

Computerized tomographic angiography (3D data representing the coronary arteries) and X-ray angiography (2D X-ray image sequences providing information about coronary arteries and their stenosis) are standard and popular assessment tools utilized for medical diagnosis of coronary artery diseases. At present, the results of both modalities are individually analyzed by specialists and it is difficult for them to mentally connect the details of these two techniques. The aim of this work is to assist medical diagnosis by providing specialists with the relationship between computerized tomographic angiography and X-ray angiography.

Matched MeSH terms: Tomography, X-Ray Computed/methods*

Loss of weight in a female heavy smoker with diffuse interstitial pulmonary fibrosis

Al-Adsani A, Dahniya MH, Al-Adsani N

Postgrad Med J, 2001 Feb;77(904):127, 137-8.

PMID: 11161092

Matched MeSH terms: Tomography, X-Ray Computed/methods

Fulltext Chronic pain management--upper visceral malignancies coeliac plexus block with CT scanning--a case report

Choy YC, Puvenesvari S, Samad S

Med J Malaysia, 1998 Sep;53(3):277-9.

PMID: 10968166

Coeliac plexus block has been described more than seventy years ago and is widely used for chronic pain management in upper visceral malignancies. The technique described here is a posterior approach using CT scan guidance with absolute ethyl alcohol. A case illustration of a patient with carcinoma of pancreas managed with coeliac plexus block for pain control is presented.

Matched MeSH terms: Tomography, X-Ray Computed*

Wavelet-based compression of medical images: filter-bank selection and evaluation

Saffor A, bin Ramli AR, Ng KH

Australas Phys Eng Sci Med, 2003 Jun;26(2):39-44.

PMID: 12956184

Wavelet-based image coding algorithms (lossy and lossless) use a fixed perfect reconstruction filter-bank built into the algorithm for coding and decoding of images. However, no systematic study has been performed to evaluate the coding performance of wavelet filters on medical images. We evaluated the best types of filters suitable for medical images in providing low bit rate and low computational complexity. In this study a variety of wavelet filters are used to compress and decompress computed tomography (CT) brain and abdomen images. We applied two-dimensional wavelet decomposition, quantization and reconstruction using several families of filter banks to a set of CT images. Discreet Wavelet Transform (DWT), which provides efficient framework of multi-resolution frequency was used. Compression was accomplished by applying threshold values to the wavelet coefficients. The statistical indices such as mean square error (MSE), maximum absolute error (MAE) and peak signal-to-noise ratio (PSNR) were used to quantify the effect of wavelet compression of selected images. The code was written using the wavelet and image processing toolbox of the MATLAB (version 6.1). This results show that no specific wavelet filter performs uniformly better than others except for the case of Daubechies and bi-orthogonal filters which are the best among all. MAE values achieved by these filters were 5 x 10(-14) to 12 x 10(-14) for both CT brain and abdomen images at different decomposition levels. This indicated that using these filters a very small error (approximately 7 x 10(-14)) can be achieved between original and the filtered image. The PSNR values obtained were higher for the brain than the abdomen images. For both the lossy and lossless compression, the 'most appropriate' wavelet filter should be chosen adaptively depending on the statistical properties of the image being coded to achieve higher compression ratio.

Matched MeSH terms: Tomography, X-Ray Computed/methods*

Computed tomography of the brain in predicting outcome of traumatic intracranial haemorrhage in Malaysian patients

Azian AA, Nurulazman AA, Shuaib L, Mahayidin M, Ariff AR, Naing NN, et al.

Acta Neurochir (Wien), 2001;143(7):711-20.

PMID: 11534693

Head injury is a significant economic, social and medical problem all over the world. Road accidents are the most frequent cause of head injury in Malaysia with highest risk in the young (15 to 24 years old). The associated outcomes include good recovery, possibility of death for the severely injured, which may cause disruption of the lives of their family members. It is important to predict the outcome as it will provide sound information to assist clinicians in Malaysia in providing prognostic information to patients and their families, to assess the effectiveness of different modes of treatment in promoting recovery and to document the significance of head injury as a public health problem.

RESULTS: A total of 103 cases with intracranial haemorrhage i.e. intracerebral haemorrhage, extradural haemorrhage, subdural haemorrhage, intraventricular haemorrhage, haemorrhagic contusion and subarachnoid haemorrhage, following motor vehicle accidents was undertaken to study factors contributing to either good or poor outcome according to the Glasgow Outcome Scale. Patients below 12 years of age were excluded. The end point of the study was taken at 24 months post injury. The selected variables were incorporated into models generated by logistic regression techniques of multivariate analysis to see the significant predictors of outcome as well as the correlation between the CT findings with GCS.

CONCLUSION: Significant predictors of outcome were GCS on arrival in the accident emergency department, pupillary reflex and the CT scan findings. The CT predictors of outcome include ICH, EDH, IVH, present of SAH, site of ICH, volumes of EDH and SDH as well as midline shift.

Matched MeSH terms: Tomography, X-Ray Computed*

Fulltext Ultrasound (US) and computed tomographic (CT) appearances of large (giant) hepatic cavernous hemangiomas

Samad SA, Maimunah A, Zulfiqar A, Zaharah M

Med J Malaysia, 1995 Mar;50(1):82-6.

PMID: 7752982

The sonographic and CT appearances of 9 large cavernous hemangiomas of the liver were studied. On sonography, 6 masses (67%) exhibit heterogenous echo pattern; where in 2 patients the echotexture was a mixture of hypoechoic and isoechoic areas and in 4 patients there are varying amounts of bright hyperreflective areas similar to the texture typical of small hemangiomas. The masses were predominantly hypoechoic in the remaining 3 patients (33%). Incremental bolus or bolus-infusion dynamic CT showed peripheral contrast enhancement of varying intensities and thickness in all patients. The lesions were incorrectly diagnosed as hepatomas in 4 patients, suspected as hemangiomas with a differential diagnosis of hepatomas in 4 patients and an early liver abscess in 1 patient. It is concluded that large cavernous hemangiomas of the liver do not exhibit the typical homogenous hyperreflective echotexture as exhibited by small lesions and they mimic primary and secondary hepatic neoplasms. However, the diagnosis of hemangioma should be entertained when such a mass contains bright hyperechoic areas within its heterogenous echo pattern and exhibit peripheral enhancement on contrast enhanced CT. In addition to correlation with appropriate clinical information, confirmation of diagnosis include delayed scanning during a routine incremental bolus dynamic CT, single-slice dynamic contrast enhanced CT, angiography or isotope scintigraphy and magnetic resonance imaging depending on the availability of facility.

Matched MeSH terms: Tomography, X-Ray Computed*

Computed tomography and ultrasonography: a comparative study in the diagnosis of analgesic nephropathy

Segasothy M, Abdul Samad S, Zulfiqar A, Shaariah W, Morad Z, Prasad Menon S

Nephron, 1994;66(1):62-6.

PMID: 8107955

Computed tomography (CT) and ultrasonography (US) were performed in 40 patients who had consumed excessive quantities of analgesics (> 1 kg) to compare their value in the diagnosis of analgesic nephropathy (AN). The computed tomography and sonographic features were renal papillary calcifications. Renal papillary necrosis (RPN) was documented in 20 of 40 patients by US and in 14 of 40 patients by CT. In 11 patients, both US and CT were positive. In 9 patients, US was positive whilst CT was negative. In 3 patients, CT was positive whilst US was negative. Prevalence of RPN was 50% using US and 35% using CT. Using US as a gold standard, sensitivity of CT was 55%, specificity 85%, positive predictive value 78.6% and negative predictive value 34.6%. Percent agreement with CT and US was 70%. Cohen's kappa statistic adjusting for chance agreement was 40%. Based on these results, it is found that US yielded a higher percentage of positive cases of RPN.

Matched MeSH terms: Tomography, X-Ray Computed/statistics & numerical data

The role of 67gallium scintigraphy and high resolution computed tomography as predictors of disease activity in sputum smear-negative pulmonary tuberculosis

Lai FM, Liam CK, Paramsothy M, George J

Int J Tuberc Lung Dis, 1997 Dec;1(6):563-9.

PMID: 9487455

University Hospital, Kuala Lumpur, Malaysia.

Matched MeSH terms: Tomography, X-Ray Computed*

CT scan changes in multiple sclerosis among Malaysian patients

Tan CT, Abdullah D, Zakariya AH

Neuroradiology, 1991;33(6):494-8.

PMID: 1780049

A study of 12 patients with clinically definite multiple sclerosis (CDMS) using high dose infusion CT showed overall abnormality of 75% with an average of 2.5 lesions per patient. 75% of the patients showed abnormality of the cerebrum, mostly asymptomatic. The main changes were ventricular dilatation and asymmetry, isolated or generalized cerebral atrophy, areas of low attenuation mainly in the deeper parts of the cerebrum and the peri-ventricular area. 25% of the patients showed changes in the brainstem and none was seen in the cerebellum. The abnormality was more florid in patients with clinically disseminated forms of the disease. The study demonstrated that asymptomatic cerebral involvement is common among Asian patients with MS and CT is a useful tool in the overall assessment and diagnosis of Asian MS patients.

Matched MeSH terms: Tomography, X-Ray Computed*

Hypodense bubbles in acute extradural haematomas following venous sinus tear. A CT scan appearance

Chee CP, Habib ZA

Neuroradiology, 1991;33(2):152-4.

PMID: 2046901

Between January 1982 and December 1989, 12 patients with 13 acute extradural haematomas as a result of injury involving the venous sinuses were treated by the first author. The CT scan appearances in 6 cases were remarkable in that there were large bubbles of low density in the hyperdense haematomas and liquid blood was found during the operation. The possible underlying pathophysiological changes that gave rise to this appearance are discussed. The CT scan appearance and the proximity of the clot to the venous sinuses should alert the neurosurgeon to the high probabilities of venous sinus tear such that proper treatment can be offered.

Matched MeSH terms: Tomography, X-Ray Computed*

Fulltext Whole lung tomography in the early detection and follow-up of lung secondaries following hydatidiform mole

Sivanesaratnam V, Singh J

Med J Malaysia, 1985 Dec;40(4):317-20.

PMID: 3842732

22 patients with proven hydatidiform molar pregnancy were subjected to whole lung tomography. By this technique, lung metastases were detected in four patients when plain chest radiographs had shown no secondaries. In a fifth patient additional nodules not observed on the plain radiographs were seen. The usefulness of this procedure as an adjunct to existing methods of following up of patients with metastatic trophoblastic disease is discussed.

Matched MeSH terms: Tomography, X-Ray*

Granulomatous pulmonary zygomycosis in a patient without underlying illness. Computed tomographic appearances and treatment by pneumonectomy

Majid AA, Yii NW

Chest, 1991 Aug;100(2):560-1.

PMID: 1864139

Pulmonary zygomycosis rarely occurs in the absence of underlying disease. We report a patient with granulomatous pulmonary zygomycosis without underlying disease who presented with a pulmonary mass. We present the computed tomographic findings that we believe have not been described previously. We also report the successful treatment by pneumonectomy.

Matched MeSH terms: Tomography, X-Ray Computed*

Relapsed non-Hodgkin's lymphoma with high CA-125 mimicking ovarian tumour

Leong CF, Cheong SK, Ng P, Amran AR

Hosp Med, 2003 Nov;64(11):686-7.

PMID: 14671884

Matched MeSH terms: Tomography, X-Ray Computed/methods

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