Improved needle-tip visualization by color Doppler sonography.
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Biopsy, Needle↗
Biomedical subjects
B L Savader
Publications and source records attributed to B L Savader.
Pelvic masses: aspiration biopsy with transrectal US guidance.
Biplanar, transrectal ultrasound guidance was used in the transrectal aspiration of two pelvic abscesses, one recurrent tumor, and one sterile, nonmalignant fluid collection. This method provides an alternative path that allows precise localization for aspiration biopsy of pelvic masses.
Abscess↗
Positional hypoechoic pseudolesions on transrectal sonography of the prostate.
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Humans↗
Magnetic resonance imaging of intracranial epidermoid tumours.
Epidermoid tumours are rare lesions within the skull which are usually found in a cerebellopontine angle. In the computed tomography (CT) literature, they have been described as well-defined lesions of low density which seldom show calcification or tissue enhancement. We have recently encountered three intracranial epidermoids, which appeared to exhibit uniform findings on low field strength magnetic resonance (MR) of moderate signal intensity in the T1-weighted images and a bright signal (increased T2) in the T2-weighted sequences. It may be possible to predict accurately the presence of an epidermoid tumour when this particular configuration of findings is present.
Adult↗
Hypothenar hammer syndrome with embolic occlusion of digital arteries.
Although the hand is highly vascular and subjected to frequent and often repeated trauma, only 52 cases of true aneurysms have been described up to 1982 (Martin and Manktelow, 1982). Of these cases, 60% involved the ulnar artery. These injuries have a distinct tendency to occur in workers who routinely use hammers and screwdrivers, thus it can be considered an occupational disease (Middleton, 1933). A single violent traumatic event is rarely the cause, but rather repeated minor trauma over several months or years appears to be the more common history. A case with arteriographic demonstration of occlusion of the common and proper digital arteries secondary to emboli originating from a traumatic true aneurysm of the ulnar artery is presented.
Accidents, Occupational↗
Puerperal ovarian vein thrombosis: evaluation with CT, US, and MR imaging.
Five women suspected of having puerperal ovarian vein thrombosis (POVT) were examined with either computed tomography (CT) (five patients), ultrasonography (US) (three patients), magnetic resonance (MR) imaging (one patient), or a combination of these modalities. CT findings included tubular retroperitoneal mass (five patients), periuterine mass (four patients), enlarged uterus (four patients), fluid in the uterus (five patients), central ovarian vein thrombus (four patients), inferior vena cava thrombus (one patient), right hydroureter (one patient), and right ureteral compression (one patient). US findings were similar to CT findings except for an inability to demonstrate the right hydroureter and ureteral compression. MR imaging demonstrated the retroperitoneal mass and central ovarian vein thrombus. CT proved to be superior for the initial evaluation and subsequent diagnosis of POVT. US was useful for follow-up examinations, and MR imaging results confirmed a case of POVT that was suspected following CT.
Female↗
Neonatal radiologic casebook: spherical communicating duplication cyst of the transverse colon.
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Colon↗
Giant pseudoaneurysm of the hepatic artery--CT demonstration. Case report.
Noninvasive imaging studies, particularly computed tomography (CT), are the first step in evaluation of patients with suspected hepatic trauma. Iatrogenic injury, accounting for up to one-third of cases, may commonly result in hepatic artery pseudoaneurysm formation. We present a case in which a giant hepatic artery pseudoaneurysm was misinterpreted as an intrahepatic hematoma on sequential CT scans due to the failure to employ dynamic contrast-enhanced scan techniques.
Aneurysm↗
Complications of interventional radiology: an imaging overview.
The growth of interventional radiology has contributed to the development of more complex procedures applicable to an increasing patient population, with maintenance of low complication rates. However, due to its invasive nature, potential complications will always be associated with each procedure. Prompt recognition of these complications allows for rapid treatment with decreased patient morbidity and mortality. This overview provides detailed statistics and diagnostic imaging for evaluation of a wide spectrum of complications from hepatobiliary, renal, and vascular interventional procedures.
Angiography↗
MR evaluation of flow in a ventricular shunt phantom with in vivo correlation.
The ability of magnetic resonance (MR) imaging to potentially distinguish areas of fluid in motion from areas of static fluid would seem to make it possible to differentiate functioning ventriculoperitoneal shunts from non-functioning shunts in hydrocephalic patients. To test this hypothesis, a standard adult ventricular shunt system including tubing and flow control valve was tested and imaged in vitro in a flow phantom on a 1.5 T magnet with flow rates of 0, 22, 1.00, 0.50, and 0.25 ml/min. A flow void sign was present in the flow control valve on mildly and heavily T2-weighted images at all four flow rates and absent when the flow rate was 0 ml/min. In addition, we were able to image a flow void sign in the flow control valve of a patient with a functioning ventricular shunt, as well as to demonstrate absence of the flow void sign in the flow control valve in a patient with an obstructed ventricular shunt. This data suggest that MR imaging of the flow control valve in patients with ventricular shunts could yield valuable information on shunt patency.
Adolescent↗
MR imaging of intrathoracic extramedullary hematopoiesis.
Intrathoracic extramedullary hematopoiesis is a rare neoplasm that is most often asymptomatic and usually discovered during a screening examination for another problem. We present a case of intrathoracic extramedullary hematopoiesis in a patient with homozygous sickle cell disease with CT and magnetic resonance correlation.
Adult↗
Sirenomelia without Potter syndrome: MR characteristics.
Sirenomelia is a rare birth defect characterized by fusion of the lower extremities into one limb and a wide spectrum of both genitourinary and lower gastrointestinal tract anomalies. We wish to report the occurrence of this syndrome in an infant whose genitourinary and gastrointestinal anomalies are compatible with life.
Abnormalities, Multiple↗
CT arterial portography vs pancreatic arteriography in the assessment of vascular involvement in pancreatic and periampullary tumors.
OBJECTIVE: Preoperative staging of pancreatic tumors is frequently accomplished through a combined effort of CT and arteriography. For tumor detection and delineation of disease extent CT is utilized routinely, with CT arterial portography (CTAP) being the single most accurate study for the detection liver metastases. Arteriography has remained the "gold" standard for assessing vascular involvement. The purpose of this study was to determine whether CTAP could become the single study of choice for assessing resectability in patients with pancreatic and periampullary tumors with particular emphasis on its accuracy in determining vascular involvement. MATERIALS AND METHODS: Radiologic studies and medical records were reviewed in 20 patients who had received both CTAP and arteriographic examinations for preoperative assessment of pancreatic and periampullary tumors. These findings were correlated with results from either surgery (12 cases) or percutaneous biopsy and follow-up (8 cases) in 12 nonresectable and 8 resectable tumors. RESULTS: Arteriography and CTAP correctly concurred in 75% of cases (15 of 20); CTAP correctly demonstrated vascular involvement not appreciated on arteriography in 15% (3 of 20) with an overall sensitivity and specificity of 90 and 100%, respectively. Arteriography was superior to CTAP in one patient (5%) with an overall sensitivity and specificity of 70 and 90%, respectively, for predicting vascular involvement by tumor. CONCLUSION: Our experience suggests that CTAP is more accurate than arteriography for demonstrating tumor involvement of major peripancreatic vessels. Because CTAP, additionally, has a high sensitivity for detecting liver metastases, no further studies may be necessary to determine operability of these patients.
Adenocarcinoma↗
Intraosseous arteriovenous malformations mimicking malignant disease.
Primary (congenital) intraosseous arteriovenous malformations are rare, accounting for less than one per cent of all primary intraosseous lesions. They are quite variable in their gross and microscopic presentation, yet all can be traced to anomalous development of the primitive vascular system. They may be totally asymptomatic, cosmetically disfiguring, painful, or on rare occasions, cause high-output cardiac failure. Surgical treatment is often unrewarding with recurrence not uncommon. Intra-arterial embolization has shown promising results. We present three cases of primary intraosseous arteriovenous malformations which on initial work-up mimicked malignant disease. Arteriography proved diagnostic in all three cases.
Adolescent↗