AJR. American journal of roentgenology
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AJR Am J Roentgenol · Jan 1996
Comparative StudyMR diagnosis of bone contusions of the knee: comparison of coronal T2-weighted fast spin-echo with fat saturation and fast spin-echo STIR images with conventional STIR images.
Bone contusions consist of posttraumatic marrow change resulting from a combination of hemorrhage, edema, and microtrabecular injury and are depicted on MR images as geographic, nonlinear areas of abnormally increased T2 marrow signal intensity. Detection of bone contusions is important, not only in that they are frequently a sign of more serious associated injury, but in that isolated contusions may account for clinical symptoms and thereby obviate further workup. We evaluated two promising rapid imaging sequences, T2-weighted fast spin-echo with fat saturation and fast spin-echo short inversion time (T1) inversion recovery (STIR) and compared their efficacy to that of conventional STIR for the diagnosis of bone contusions in knees. ⋯ Because of their comparable accuracy and short imaging time characteristics, coronal fast spin-echo with fat saturation and fast spin-echo STIR sequences are superior to conventional STIR sequences for the diagnosis of bone contusions in knees.
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The purpose of our study was to determine the value of unenhanced CT in the diagnosis of acute flank pain. We determined the accuracy of unenhanced Ct for stone detection as well as the detection of abnormalities unrelated to stone disease. ⋯ Unenhanced CT is a valuable technique for examining patients with acute flank pain in whom a clinical diagnosis is uncertain. It can accurately determine the presence or absence of ureteral stones as well as extraurinary causes of acute flank pain. In most cases, other imaging studies are not required.
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AJR Am J Roentgenol · Jan 1996
Duplex sonography of the carotid arteries in patients with isolated aortic stenosis: imaging findings and relation to severity of stenosis.
The purposes of this study were to identify carotid artery duplex waveform abnormalities in patients with isolated aortic stenosis and to determine whether waveform abnormalities correlate with the severity of valvular disease. ⋯ Increased acceleration time, decreased peak velocity, delayed upstroke, and rounded waveform are characteristic abnormalities found in duplex sonographic studies of the carotid arteries in patients with aortic stenosis. The degree of each of these abnormalities correlates with the valve area. Patients with critical or severe aortic stenosis had findings significantly different from those in the control group. Patients with mild or moderate disease showed few or no sonographic abnormalities.
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AJR Am J Roentgenol · Jan 1996
Detection of bleeding in patients with major pelvic fractures: value of contrast-enhanced CT.
We performed a retrospective review of trauma patients who had undergone both pelvic angiography and preangiographic i.v. contrast-enhanced CT to determine whether CT can accurately demonstrate the presence or absence of pelvic bleeding in patients with multisystem trauma and major pelvic fractures. ⋯ Knowledge of sites of ongoing hemorrhage is crucial for optimizing the sequence of diagnostic and therapeutic studies in patients with blunt trauma. Contrast-enhanced CT of the pelvis, which is often performed for hemodynamically stable trauma patients, is a noninvasive technique that is highly accurate in determining the presence or absence of ongoing pelvic hemorrhage. This information can assist in initial management decisions involving patients with multisystem trauma and major pelvic fractures.
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AJR Am J Roentgenol · Jan 1996
Imaging of superficial soft-tissue infections: sonographic findings in cases of cellulitis and abscess.
The variation in the sonographic appearances of superficial soft-tissue infections probably reflects a continuous process that leads from soft-tissue edema, seen in cellulitis, to a fully developed abscess and that depends on the type of infection or the immune status of the host. We describe the sonographic findings seen in this process and the variable appearance of abscesses, with emphasis on scanning techniques that facilitate the diagnosis of liquefaction.