MCQ Radiology Answer 20

The Correct answer is C

Explanation:

DVT (Deep Venous Thrombosis) and PE (Pulmonary Embolism) are one of the major common challenges in day-to-day radiology practice. There are no common censuses or guidelines in the diagnosis and management of DVT or PE. D-dimer has a high negative predictive value, i.e. excluding DVT or PE, but it lackes positive predictive value. Duplex ultrasound remains investigation of choice in most of the hospitals to exclude or confirm DVT as this investigation is highly sensitive and specific (both >90%). VQ scan still remains a very common investigation in the diagnosis of PE and is based on PIOPED trail. Although conventional angiography is traditionally considered as a gold standard, CTPA is gaining wider acceptance in diagnosing PE, despite more dose than VQ scan. MRI is being tried in the diagnosis of PE and DVT by a technique (MRI-DTI, DTI= Direct Thrombus Imaging) which detects methhaemoglobin (M-Hb) and the initial results are promising.

Reference: Scarsbrook AF et al. Diagnosis of suspected venous thromboembolic disease in pregnancy. Clin Rad 2006: 61: 1-12

Category: Radiology MCQs