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Biomedical subjects

P D Radecki

Publications and source records attributed to P D Radecki.

At least 19 recordsLinked to original sources
PubMed1995

Distinction between benign and malignant adrenal masses: value of T1-weighted chemical-shift MR imaging.

OBJECTIVE: Accuracy of T1-weighted chemical-shift MR imaging for the differentiation between benign and malignant adrenal masses was blindly assessed among three radiologists. SUBJECTS AND METHODS: MR imaging was performed at 1.5 T in 50 patients with 58 adrenal masses, proved benign (n = 38) or malignant (n = 20) based on surgery or growth (malignant) or stable size (benign) for at least 1 year. In-phase spin-echo sequences or in-phase breath-hold fast multiplanar spoiled gradient-recalled echo (FMPSPGR) sequences with a TE of 4.2 msec were compared with opposed-phase breath-hold FMPSPGR sequences with a TR/TE of 35-155/2.2-2.9 and a 90 degrees flip angle for the detection of lipid in adrenal masses. Three radiologists who were blinded to diagnosis and clinical data independently rated the likelihood of a benign adrenal lesion on a five-point scale of confidence. RESULTS: Mean sensitivity, specificity, and positive predictive value for a definite or probable diagnosis of a benign lesion by the three readers were 87%, 92%, and 95%, respectively. At the highest (definite) confidence of a benign lesion, the mean positive predictive value was 99%, with lower sensitivity (54%). Areas under receiver operating characteristic curves for the three radiologists were .98 (95% confidence interval [CI] = .94-1.00), .96 (CI = .91-1.00), and .95 (CI = .89-1.00). Interobserver variation for the diagnosis of a benign mass was low (kappa = .79). CONCLUSION: Chemical-shift imaging using breath-hold opposed-phase T1-weighted MR images is a reliable and reproducible technique for the diagnosis of most benign adrenal masses at the highest threshold of confidence.

Adrenal Gland Neoplasms↗
PubMed1994

Intrathoracic scapular prolapse after thoracotomy.

The authors present a case of intrathoracic prolapse of the scapula after anterolateral thoracotomy. Although shoulder deformity and weakness have been reported after thoracotomy, intrathoracic scapular displacement has not previously been described. Debilitation and steroid therapy may have contributed to weakness of the chest wall. Computed tomography of the thorax was essential in making the diagnosis.

Humans↗
PubMed1993

Carcinoid of the intrahepatic ducts.

Carcinoid tumors of the biliary tree are rare. To the best of our knowledge, this is the first reported case of an intrahepatic ductal carcinoid and the thirteenth reported case of biliary carcinoid. The radiographic appearance is variable. A brief review of the previously described cases is presented.

Adult↗
PubMed1993

Computed tomographic, magnetic resonance, and monoclonal antibody imaging of endocrine tumors.

Recent advances in diagnostic imaging with computed tomography, magnetic resonance imaging, and monoclonal antibody imaging in endocrine tumor evaluation are reviewed. Computed tomography is a mature technology whose role has not changed recently. Magnetic resonance imaging is continuing to advance in scan techniques, scan time reduction, and use of intravenous contrast agents; its future role on a routine basis may allow it to supplant computed tomography in endocrine tumor identification. Monoclonal antibody imaging has not yet proven to be as reliably diagnostic for tumor identification as is computed tomography, but continuing technical advances predict an advancing role for diagnosing endocrine tumors with this modality.

Adrenal Glands↗
PubMed1991

Diagnostic imaging in puerperal febrile morbidity.

This retrospective study was conducted to assess the value of imaging in patients with refractory puerperal febrile morbidity. During a 36-month period, 31 patients were referred for ultrasound and/or computed tomography or magnetic resonance imaging because of postpartum fever unresponsive to broad-spectrum antibiotic therapy of at least 72 hours' duration. Hematomas were identified in 11 women. Abscesses were diagnosed in seven patients, ovarian venous thrombosis in two, vesicouterine fistula in one, small-bowel obstruction in one, and a subcutaneous seroma in one. Twenty-one women had endomyometritis, 13 of whom also had other extrauterine abnormalities (abscess in six, hematoma in four, and ovarian venous thrombosis, vesicouterine fistula, and small-bowel obstruction in one each). Retained placental tissue was found in two women with endomyometritis. Only two subjects had negative imaging studies. In most patients, imaging led to definitive diagnosis and specific therapeutic measures resulting in resolution of the febrile morbidity. Our experience suggests that these imaging techniques may be helpful in evaluating puerperal fever.

Abdomen↗
PubMed1990

Staging of ureteral transitional cell carcinoma by CT and MRI.

Intravenous urography and retrograde pyelography are the primary radiologic studies for detecting ureteral carcinoma but give limited information regarding stage of disease. Computed tomography (CT) and magnetic resonance imaging (MRI) delineate the extent of ureteral carcinomas with a high degree of accuracy by depicting the periureteral fat and presence or absence of lymphadenopathy. In selected cases, CT and MRI are valuable for assessing the presence or absence of tumor in a ureteral stump and for the differential diagnosis of ureteral obstruction. Five cases of ureteral carcinoma and 2 cases of stump carcinoma are presented with preoperative CT and/or MRI evaluation and staging.

Aged↗
PubMed1989

Ovarian vein thrombosis with atypical presentation: role of sonography and duplex Doppler.

Ovarian vein thrombosis was diagnosed in two patients, one postoperatively and one postpartum, with mild, atypical presentations, using sonography and duplex Doppler. Demonstration of the dilated ovarian vein with internal thrombus, without demonstrable flow by Doppler, was diagnostic. We propose that sonography with duplex Doppler be the initial screening examination in at-risk patients with typical or atypical presentations.

Adult↗
PubMed1988

Relative merits of MRI, transrectal endosonography and CT in diagnosis and staging of carcinoma of prostate.

Magnetic resonance imaging (MRI) and transrectal sonography of 27 patients with biopsy-proved carcinoma of the prostate were performed to compare the sensitivity of these modalities to each other for diagnosis and to computed tomography (CT) for staging. Sonography was superior to MRI for the detection of intraglandular carcinoma and capsular disruption. MRI was superior to both sonography and CT for evaluating seminal vesicle invasion, and slightly better than CT for detecting lymphadenopathy.

Carcinoma↗
PubMed1988

Esophageal disruption: evaluation with iohexol esophagography.

Twenty-six patients with possible esophageal disruption who were also at risk for aspiration or direct communication of the esophagus with the tracheobronchial tree were examined with iohexol esophagography. Fifteen patients had normal studies confirmed by findings at a barium examination performed immediately after. In 11 patients abnormalities were diagnosed on the basis of iohexol esophagograms; the abnormalities included extraluminal extravasation of contrast material (n = 7), aspiration (n = 1), esophageal stricture with intramural diverticulosis (n = 1), edema of the gastroesophageal junction (n = 1), and epiphrenic diverticulum (n = 1). Eight of these patients were immediately reexamined with barium esophagography, which yielded no additional information. Low-osmolality, water-soluble contrast agents are a safe alternative for patients in whom barium esophagography poses a risk of mediastinitis and esophagography with diatrizoate meglumine and diatrizoate sodium (Gastrografin) poses a risk of pulmonary edema.

Adult↗