Vol. 6, No. 4, 2003

Table of Contents


Radiotherapy for Optic Nerve Sheath Meningiomas

WM Mendenhall, RJ Amdur, CG Morris, WA Friedman

Hong Kong J Radiol 2003;6:183-6

Objective: To determine the outcome after radiotherapy for optic nerve sheath meningiomas.

Patients and Methods: Six patients were treated with conventional (1 patient) or stereotactic (5 patients) radiotherapy and were followed up from 3.1 to 9.9 years (mean, 6.2 years).

Scan Mode Performance of Dual Energy X-ray Absorptiometry Bone Densitometer

SK Yu, KM Ma, SK Cheung

Hong Kong J Radiol 2003;6:187-90

Objective: A commercially available dual energy X-ray absorptiometry scanner normally provides more than 1 scan mode. The differences between scan modes affect scan time, received radiation dose, and quality of the scan image. A phantom study was performed

Quantitative Analysis of Artifacts Created by Metallic Orthopaedic Implants

SK Yu, WL Poon, KF Lai, MK Yuen

Hong Kong J Radiol 2003;6:191-4

Objective: To evaluate the magnitude of artifacts created by different materials commonly used in orthopaedic implants and their variation with the distance from the implants.

Patients and Methods: Metallic orthopaedic implants made of 3 different types of materials (stainless steel,

Comparison of Spot Digital and Conventional Mammography in the Evaluation of Microcalcifications

KKT Pak, JLF Chiu, CS Kwok, SC Wong, SY Yiu, SCH Chan

Hong Kong J Radiol 2003;6:195-200

Objective: To compare the diagnostic accuracy of spot digital and conventional screen-film mammography and the influence of clinical data on the characterisation of microcalcifications.

Patients and Methods: Twenty nine patients with 30 groups of microcalcifications were studied. Two radiologists assessed


Abdominal Cocoon Syndrome

S Ranganathan, BJJ Abdullah, V Sivanesaratnam

Hong Kong J Radiol 2003;6:201-3

The abdominal cocoon syndrome was first described as a rare condition where part of or the whole small bowel is encased within a fibrous membrane. This report is of a 25-year-old Chinese woman who presented with increasing abdominal distension and

Type IV Spinal Arteriovenous Malformation in a Child

A Li, YYR Chan, CY Lui, S Lau, KL Mak, HS Lam

Hong Kong J Radiol 2003;6:204-7

A 4-year-old boy presented with motor weakness and was subsequently found to have intraspinal extramedullary arteriovenous malformation (type IV C arteriovenous malformation) at the cervical region. Angiographic embolisation was performed. This patient illustrates the clinical inconspicuousness of spinal arteriovenous malformation

Solitary Fibrous Tumour of the Urinary Bladder

FCY Lam, JLY Leung, PWY Lam, TL Kwan

Hong Kong J Radiol 2003;6:208-10

Solitary fibrous tumour is an uncommon fibrous neoplasm. It was first described in the pleura, although extrapleural sites have also been reported. Solitary fibrous tumour arising from the urinary tract is rare. This report is of a patient with solitary

Carotid Artery Occlusion in a Patient with Intracranial Rosai-Dorfman Disease

JLY Leung, JYL Cheung, TC Tan, KW Tang, CM Chan, LC Ho, SCH Chan

Hong Kong J Radiol 2003;6:211-3

Intracranial involvement of Rosai-Dorfman disease is rare. Central nervous system involvement occurs in less than 5% of patients. To date, there have only been 52 patients with this condition reported in 41 articles. This report is of a patient with

Intraductal Papillary Mucinous Tumour of the Bile Ducts

EPY Fung, WH Luk, S Lau, TK Loke, JCS Chan

Hong Kong J Radiol 2003;6:214-6

This report is of a rare case of intraductal papillary mucinous tumour of the bile ducts. As diffuse biliary duct dilatation can be the only radiological finding, it may be difficult to differentiate this condition from recurrent pyogenic cholangitis which


Central Nervous System Tuberculosis

JLS Khoo, KY Lau, CM Cheung, TH Tsoi

Hong Kong J Radiol 2003;6:217-28

The imaging findings of 9 patients with central nervous system tuberculosis are presented to highlight the typical findings and some complications. Lesions may involve the meninges, brain, and spinal cord. Contrast-enhanced magnetic resonance imaging is the best imaging modality for