J Korean Radiol Soc.  2002 Jul;47(1):21-26. 10.3348/jkrs.2002.47.1.21.

Evaluation of the Pedal Artery: Comparison of Three-dimensional Gadolinium-Enhanced MR Angiography with Digital Subtraction Angiography

• Lee JM
• Kang SG
• Byun JN
• Kim YC
• Choi JY
• Kim DH
• Chang JH
• Kim YS

• KMID: 1833565
• DOI: http://doi.org/10.3348/jkrs.2002.47.1.21

Abstract

PURPOSE: To compare the three-dimensional gadolinium-enhanced MR angiography with digital subtraction angiography (DSA) for evaluation of the pedal artery.
MATERIALS AND METHODS
In 12 extremities of 11 patients, both digital subtraction angiography (DSA) and contrast-enhanced MR angiography (CE-MR angiography) were performed during the same week. Among ten of the 11 patients, the following conditions were present: atherosclerosis (n=4), diabetic foot (n=3), Buerger's disease (n=1), calciphylactic arteriopathy (n=1) and arteriovenous malformation of the foot (n=1). The remaining patient underwent angiography prior to flap surgery. For MR angiography, a 1.5T system using an extremity or head coil was used. A three-dimensional FISP (fast imaging with steady state precession) sequence was obtained before enhancement, followed by four sequential acquisitions (scan time, 20 secs; scan interval time, 10 secs) 10 seconds after intravenous bolus injection of normal saline (total 10 cc), following intravenous adminstration of gadolinium (0.02 mmol/kg, 3 ml/sec). Arterial segments of the ankle and foot were classified as the anterior or posterior tibial artery, the distal peroneal artery, the medial or lateral plantar artery, the pedal arch, and the dorsalis pedis artery. Two radiologists independently analysed visualization of each arteraial segment and the mean of visible arterial segments in one extreminty using CE-MR angiography and DSA.
RESULTS
Among 84 arterial segments, 16 were invisible at both CE-MR angiography and DSA, while 39 were demonstrated by both modalities. Twenty-six segments were visible only at CE-MR angiography and three only at DSA. CE-MR angiography displayed a higher number of arterial segments than DSA (mean, 5.42 vs. mean 3.50, respectively), a difference which was statistically significant (p<0.000). The difference between each arterial segment was not statistically significant, except for the dorsalis pedis artery (t test, p<0.000).
CONCLUSION
In that it provides additional information for the planning of treatment of lower-extremity arterial disease, three-dimensional CE-MR angiography is superior to DSA for evaluation of the pedal artery.

Keyword

Magnetic resonance (MR), vascular studies; Magnetic resonance (MR), contrast enhancement; Extremities, MR; Angiography

MeSH Terms

Angiography*
Angiography, Digital Subtraction*
Ankle
Arteries*
Arteriovenous Malformations
Atherosclerosis
Diabetic Foot
Extremities
Foot
Gadolinium
Head
Humans
Thromboangiitis Obliterans
Tibial Arteries
Gadolinium