Aortoiliac stenooculusive disease and aneurysms: screening with non-contrast enhanced two-dimensional cardiac gated cine phase contrast MR angiography with multiple velocity encoded values and cardiac gated two-dimensional time-of-flight MR angiography.
OBJECTIVE
To evaluate the performance of two-dimensional cine phase contrast MRA with multi-velocity encoded values (multi-VENC cine PC) and ECG-gated two-dimensional time-of-flight MRA (ECG-2D-TOF) for the detection of stenoocclusive lesions and aneurysms in the aortoiliac area, when each method was used individually and when the two methods were used together.


METHODS
Forty-one patients were included in this study. Multi-VENC cine PC and ECG-2D-TOF were obtained first, then contrast enhanced three-dimensional magnetic resonance angiography (CE-3D-MRA) was performed as the standard of reference. Two observers reviewed the images separately without knowledge of patients' symptoms or histories. Sensitivities and specificities were obtained separately for stenooclusive lesions and aneurysms by two reviewers.


RESULTS
When the two methods were applied together, high sensitivities (93.0 by observer 1 and 91.9% by observer 2) and adequate specificities (87.6 and 82.3%) were obtained for stenoocclusive lesions. For aneurysms, moderate to high sensitivities (91.1 and 71.1%) and high specificities (98.8 and 99.4%) were obtained.


CONCLUSIONS
These results suggest that the performance of two non-contrast enhanced MRA techniques may be valuable as a screening tool when the two methods are applied together.
Naganawa
S
S
Department of Radiology, Nagoya University School of Medicine, Japan.
Koshikawa
T
T
Kato
K
K
Ishiguchi
T
T
Ishigaki
T
T
Sato
K
K
Katagiri
T
T
Kishimoto
H
H
Mimura
T
T
Takizawa
O
O
Imura
C
C
D000368:Aged; D017544:Aortic Aneurysm, Abdominal / Q000175:diagnosis*; D001018:Aortic Diseases / Q000175:diagnosis*; D001157:Arterial Occlusive Diseases / Q000175:diagnosis*; D003287:Contrast Media; D005260:Female; D006801:Humans; D017543:Iliac Aneurysm / Q000175:diagnosis*; D018810:Magnetic Resonance Angiography / Q000379:methods*; D019028:Magnetic Resonance Imaging, Cine; D008297:Male; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity
D003287:Contrast Media