AN ALTERNATIVE SCANNING PROTOCOL TO ELIMINATE PERIVENOUS STREAK ARTIFACTS IN THORACIC SPIRAL COMPUTED TOMOGRAPHY : THE USEFULNESS OF ANKLE VEIN CONTRAST INJECTION

概要

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Purpose : To eliminate perivenous streak artifact from contrast-enhanced thoracic spiral CT using superficial ankle vein injection (ankle vein method). Methods : Forty-four consecutive inpatients had thoracic spiral CT following ankle vein method and were compared to 30 patients who had conventional antecubital vein injection. Non-ionic 300 mg/mL contrast material were injected at 1-1.5 mL/sec with a power injector. Twenty mL of normal saline was injected immediately thereafter as a flushing bolus. Qualitative scores of perivenous artifact (1 to 5=extensive) and vascular enhancement (1 to 5=excellent) were recorded. Complications were investigated clinically. Results : The mean score of perivenous artifact was 1 with the ankle vein method and 4.4 with the conventional method (P<.0001). Scores of pulmonary artery opacification were almost equal (4.2 and 4.5 respectively, P=.11). No complications were observed. Conclusions : The ankle vein method is an effective method to prevent perivenous artifact during thoracic spiral CT.
名古屋市立大学の論文
2001-02-01