[A rational study of the great abdominal veins using 2D-TOF- and turbo-spin-echo sequences].
OBJECTIVE
Development of a fast and reliable protocol for the detection and exclusion of abdominal venous thrombosis with an optimised T2-TSE- and 2D-TOF sequence.


METHODS
Evaluation of the flow-void phenomenon with a flow phantom on a 1.5 and 0.5 Tesla system using different echo times. Examination of 22 patients with suspected abdominal shunt- or abdominal vein-thrombosis with a optimum T2-TSE- and 2D-TOF sequence with a 1.5 or 0.5 Tesla system. Confirmation of thrombosis with contrast-enhanced computed tomography or digital subtraction angiography.


RESULTS
The most effective combination of strong flow-void phenomena, signal/noise ratio and scan time was found with the following parameters: TE 120 ms, TR 2000 ms, 5 mm slice gap. In the patient group two complete and two partial thromboses were diagnosed with both sequences. One wrong positive thrombosis occurred in a stenotic anastomosis with the 2D-inflow sequence.


CONCLUSIONS
With optimum parameters the T2-TSE sequence produces a strong "flow-void" phenomenon suitable for "black-blood"-MRA. The use of this sequence alone or in combination with 2D-inflow MRA, if "bright-blood" MRA is recommended, allows a reliable evaluation of thrombosis in abdominal veins without high-tech MRA equipment and contrast media.
Radiologische Klinik, Universität Bonn.
G
G
Lutterbey
J
J
Gieseke
T
T
Sommer
E
E
Keller
C
C
Kuhl
H H
HH
Schild
D000005:Abdomen / Q000098:blood supply*; D000328:Adult; D000368:Aged; D015901:Angiography, Digital Subtraction; D005260:Female; D006801:Humans; D018810:Magnetic Resonance Angiography / Q000295:instrumentation / Q000379:methods*; D008297:Male; D008875:Middle Aged; D019047:Phantoms, Imaging; D010690:Phlebography; D011446:Prospective Studies; D011860:Radiography, Abdominal; D013924:Thrombophlebitis / Q000175:diagnosis; D014057:Tomography, X-Ray Computed; D014680:Veins / Q000473:pathology