AJR. American journal of roentgenology
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AJR Am J Roentgenol · Jun 1996
Unenhanced helical CT of ureteral stones: incidence of associated urinary tract findings.
The objective of this study was to determine the incidence of urinary tract findings associated with ureteral stones on unenhanced helical CT scans of patients with acute renal colic. ⋯ In patients with ureteral calculi imaged with unenhanced CT for acute renal colic, associated findings included hydronephrosis, hydroureter, perinephric soft-tissue changes, and periureteral edema. These common findings provided supportive evidence that an acute obstructive process was present.
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AJR Am J Roentgenol · Jun 1996
Complex radial folds versus subtle signs of intracapsular rupture of breast implants: MR findings with surgical correlation.
Detection of intracapsular rupture of silicone breast prostheses using MR imaging is often performed by identifying the "linguine sign" [1]. The linguine sign is easily differentiated from simple radial folds that are seen in intact implants. However, more subtle signs of intracapsular rupture, including undulating subcapsular lines and the "teardrop sign," are less often recognized [2-5] and may prove difficult for the less experienced radiologist to differentiate from complex radial folds of intact implants. In this essay, we illustrate the MR imaging findings of complex radial folds in intact implants and compare them with findings of incomplete shell collapse in ruptured implants in a surgically confirmed series of explanted silicone breast prostheses.
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AJR Am J Roentgenol · May 1996
Comparative StudyDetection of focal hepatic lesions with MR imaging: prospective comparison of T2-weighted fast spin-echo with and without fat suppression, T2-weighted breath-hold fast spin-echo, and gadolinium chelate-enhanced 3D gradient-recalled imaging.
The purpose of this study was to compare breath-hold three-dimensional (3D) rapid gradient-echo (GRE) MR imaging obtained before and after gadolinium chelate injection with T2-weighted fast spin-echo and T2-weighted breath-hold fast spin-echo (BHFSE) MR imaging in the detection of focal hepatic masses. ⋯ Gadolinium chelate-enhanced 3D rapid GRE imaging is superior to T2-weighted fast spin-echo images obtained with or without fat suppression for the detection of focal hepatic masses. T2-weighted BHFSE is similar to T2-weighted fast spin-echo images in detecting focal hepatic lesions.
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AJR Am J Roentgenol · May 1996
Pneumothorax after small-bore catheter placement for malignant pleural effusions.
The objective of this study was to evaluate the incidence and significance of pneumothorax after small-bore chest tube placement for symptomatic malignant pleural effusions. ⋯ Pneumothorax should be recognized as a common finding after chest tube placement and immediate fluid drainage for malignant pleural effusions. We suggest that this finding is related to rapid removal of fluid from a relatively stiff, noncompliant lung. Patients whose lungs do not fully re-expand in several days will probably not benefit from sclerotherapy. Their tubes may be removed without risk of an enlarging tension pneumothorax.