title: [Usefulness of lower extremity 2D TOF MR venography with respiratory compensation technique, and effect of patient positioning on the visualization of deep veins in the leg].
abstract: We evaluated the usefulness of two-dimensional time-of-flight (2D TOF) MR venography (MRV) of the lower extremity using the respiratory compensation (RC) technique. In addition, six variations in patient positioning of the leg and knee were investigated to determine the best method of visualizing the deep popliteal veins and lower leg. All data sets were reviewed and graded for visualization of the deep veins at the pelvis, thigh, and leg portion (4-point scale) by two radiologists and three radiological technologists. The same veins demonstrated with various positions of the patient were also evaluated in the same manner. In conclusion, 2D TOF MRV with RC resulted in increased uniformity of vein signal in the pelvic area. Furthermore, we should position the patient's leg so as not to compress the vein at the posterior portion of the leg, and not to over-extend the knee joint. This enabled the best results to be obtained in MRV of the lower extremity.
authors.affiliation: Department of Radiology, Kitasato University Hospital.
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Hata
authors.forename: Masanori
authors.initials: M
authors.lastname: Ozaki
authors.forename: Mitsuhiro
authors.initials: M
authors.lastname: Uike
authors.forename: Makoto
authors.initials: M
authors.lastname: Aizawa
authors.forename: Hironori
authors.initials: H
authors.lastname: Hanawa
authors.forename: Naoji
authors.initials: N
authors.lastname: Suzuki
authors.forename: Eisuke
authors.initials: E
authors.lastname: Satou
authors.forename: Mayumi
authors.initials: M
authors.lastname: Satou
authors.forename: Satoko
authors.initials: S
authors.lastname: Ishikawa
authors.forename: Youko
authors.initials: Y
authors.lastname: Seto
authors.forename: Ryouko
authors.initials: R
authors.lastname: Kazaoka
mesh_terms: D000328:Adult; D006801:Humans; D007866:Leg / Q000098:blood supply*; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008875:Middle Aged; D011152:Popliteal Vein / Q000000981:diagnostic imaging; D011187:Posture; D011859:Radiography