Research Topics
| Antonio C WestphalenSummaryAffiliation: University of California Country: USA Publications
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Detail Information
Publications
Locally recurrent prostate cancer after external beam radiation therapy: diagnostic performance of 1.5-T endorectal MR imaging and MR spectroscopic imaging for detectionAntonio C Westphalen
Department of Radiology, University of California San Francisco, 505 Parnassus Ave, Box 0628, M 372, San Francisco, CA 94143 0628, USA
Radiology 256:485-92. 2010..To determine if performing magnetic resonance (MR) spectroscopic imaging, compared with performing T2-weighted MR imaging alone, improves the detection of locally recurrent prostate cancer after definitive external beam radiation therapy...- Mucinous adenocarcinoma of the prostate: MRI and MR spectroscopy featuresAntonio C Westphalen
Department of Radiology, University of California, San Francisco, 505 Parnassus Ave, M 372, Box 0628, San Francisco, CA 94143 0628, USA
AJR Am J Roentgenol 193:W238-43. 2009..CONCLUSION: MRI and MR spectroscopy do not appear to provide the ability to reliably detect the lakes of extracellular mucin seen in mucinous adenocarcinoma of the prostate... 
T2-Weighted endorectal magnetic resonance imaging of prostate cancer after external beam radiation therapyAntonio C Westphalen
Department of Radiology, Abdominal Imaging Section, University of California San Francisco, San Francisco, California 94143 0628, USA
Int Braz J Urol 35:171-80; discussion 181-2. 2009..To retrospectively determine the accuracy of T2-weighted endorectal MR imaging in the detection of prostate cancer after external beam radiation therapy and to investigate the relationship between imaging accuracy and time since therapy...- Role of magnetic resonance imaging and magnetic resonance spectroscopic imaging before and after radiotherapy for prostate cancerAntonio C Westphalen
Department of Radiology, University of California, San Francisco, San Francisco, California 94143, USA
J Endourol 22:789-94. 2008.... - Peripheral zone prostate cancer: accuracy of different interpretative approaches with MR and MR spectroscopic imagingAntonio C Westphalen
Department of Radiology, University of California San Francisco, 505 Parnassus Ave, Box 0628, M 372, San Francisco, CA 94143 0628, USA
Radiology 246:177-84. 2008.... - Pretreatment endorectal magnetic resonance imaging and magnetic resonance spectroscopic imaging features of prostate cancer as predictors of response to external beam radiotherapyTim Joseph
Department of Radiology, University of California San Francisco, San Francisco, CA 94143 0628, USA
Int J Radiat Oncol Biol Phys 73:665-71. 2009.... - Diagnosis of cirrhosis by spiral computed tomography: a case-control study with feature analysis and assessment of interobserver agreementAlexander Keedy
Department of Radiology, University of California, San Francisco, San Francisco, CA 94143 0628, USA
J Comput Assist Tomogr 32:198-203. 2008..To determine the accuracy and interobserver agreement of spiral computed tomography (CT) in the diagnosis of cirrhosis... 
Computed tomography of the acute abdomen in patients with atrial fibrillationStephen J Hunt
Department of Radiology, University of California San Francisco, San Francisco, CA, USA
J Comput Assist Tomogr 33:280-5. 2009..To investigate the frequency and basis of clinically relevant computed tomographic (CT) findings in patients with atrial fibrillation and acute abdominal pain...- Computed tomographic distinction of perirenal liposarcoma from exophytic angiomyolipoma: a feature analysis studyJames J Ellingson
Department of Radiology, University of California San Francisco, San Francisco, CA 94143 0628, USA
J Comput Assist Tomogr 32:548-52. 2008..To identify computed tomographic (CT) findings that distinguish perirenal liposarcomas from exophytic angiomyolipomas... - The equivocal appendix at CT: prevalence in a control populationEmily M Webb
Department of Radiology, University of California San Francisco, San Francisco, CA 94143 0628, USA
Emerg Radiol 17:57-61. 2010..While appendicitis could undoubtedly occur in an isodense appendix between 6 and 10 mm in diameter, such an appearance can occur in up to 6.6% of the normal population... - Diagnosis of prostate cancer in patients with an elevated prostate-specific antigen level: role of endorectal MRI and MR spectroscopic imagingNick G Costouros
Department of Radiology, University of California, San Francisco, 505 Parnassus Ave, Rm M 372, Box 0628, San Francisco, CA 94143 0628, USA
AJR Am J Roentgenol 188:812-6. 2007..The objective of our study was to determine the accuracy of endorectal MRI and MR spectroscopic imaging (MRSI) in the diagnosis of prostate cancer in patients with an elevated serum prostate-specific antigen (PSA) level... - Computed tomographic appearance of Prolene Hernia System and polypropylene mesh plug inguinal hernia repairVictor H W Yeung
Department of Radiology, University of California San Francisco, San Francisco, CA 94143 0628, USA
J Comput Assist Tomogr 32:529-32. 2008..To describe the normal postoperative computed tomographic (CT) appearance of inguinal hernia repair with the Prolene (polypropylene) Hernia System and polypropylene mesh plug... - Prostate cancer: role of pretreatment MR in predicting outcome after external-beam radiation therapy--initial experienceDavid A McKenna
Department of Radiology, University of California, San Francisco, M 372, 505 Parnassus Ave, San Francisco, CA 94143 0628, USA
Radiology 247:141-6. 2008..To retrospectively determine if pretreatment endorectal magnetic resonance (MR) imaging findings are predictive of outcome in patients who undergo external-beam radiation therapy for prostate cancer... - Does local recurrence of prostate cancer after radiation therapy occur at the site of primary tumor? Results of a longitudinal MRI and MRSI studyElnasif Arrayeh
Department of Radiology and Biomedical Imaging, University of California San Francisco, California, USA
Int J Radiat Oncol Biol Phys 82:e787-93. 2012.... - Endorectal MRI after radiation therapy: questioning the sextant analysisShilpa R Kumbhani
Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, California 94143 0628, USA
J Magn Reson Imaging 33:1086-90. 2011..Despite its known limitations, sextant is the generally accepted standard for magnetic resonance imaging (MRI) and biopsy coregistration; nevertheless, depending on the magnitude of localization errors, other options may be adequate... - Evaluation of diffuse liver steatosis by ultrasound, computed tomography, and magnetic resonance imaging: which modality is best?Aliya Qayyum
Department of Radiology, University of California San Francisco, 505 Parnassus Avenue, San Francisco, CA 94143 0628, USA
Clin Imaging 33:110-5. 2009..To compare ultrasound, computed tomography (CT), and magnetic resonance imaging (MRI) determination of diffuse liver steatosis... - Prostate cancer: is inapparent tumor at endorectal MR and MR spectroscopic imaging a favorable prognostic finding in patients who select active surveillance?Alvin R Cabrera
Department of Radiology, University of California, San Francisco, CA 94143 0628, USA
Radiology 247:444-50. 2008..To retrospectively determine whether inapparent tumor at endorectal magnetic resonance (MR) imaging and MR spectroscopic imaging is a favorable prognostic finding in prostate cancer patients who select active surveillance for management... - Vascular contact with soft tissue: a sign of mesenteric masses at computed tomographyBenjamin M Yeh
Department of Radiology, University of California San Francisco, San Francisco, CA 94143 0628, USA
J Comput Assist Tomogr 32:185-90. 2008..To evaluate prevalence of mesenteric vascular contact at routine computed tomography (CT) and evaluate its value for distinguishing missed mesenteric masses from adjacent bowel... - Spectrum of CT findings in patients with atrial fibrillation and nontraumatic acute abdomenRamon F Barajas
Department of Radiology, University of California San Francisco, Box 0628, M 372, 505 Parnassus Ave, San Francisco, CA 94143 0628, USA
AJR Am J Roentgenol 193:485-92. 2009..CONCLUSION: Underlying embolic or hemorrhagic complications are common in patients with acute nontraumatic abdominal pain in the setting of atrial fibrillation and can be accurately seen on CT... - Validity of prostate-specific antigen as a tumour marker in men with prostate cancer managed by watchful-waiting: correlation with findings at serial endorectal magnetic resonance imaging and spectroscopic imagingFergus V Coakley
Department of Urology, The University of California at San Francisco, San Francisco, CA, USA
BJU Int 99:41-5. 2007.... - Prostate cancer: prediction of biochemical failure after external-beam radiation therapy--Kattan nomogram and endorectal MR imaging estimation of tumor volumeAntonio C Westphalen
Department of Radiology and Biomedical Imaging, University of California San Francisco, 505 Parnassus Ave, Box 0628, Room M 372, San Francisco, CA 94143 0628, USA
Radiology 261:477-86. 2011..To determine whether magnetic resonance (MR) imaging and MR spectroscopic imaging findings can improve predictions made with the Kattan nomogram for radiation therapy... - Imaging prostate cancerAdam J Jung
Department of Radiology and Biomedical Imaging, University of California San Francisco, 350 Parnassus Avenue, Suite 307, San Francisco, CA 94143, USA
Radiol Clin North Am 50:1043-59. 2012..The role of transrectal ultrasonography, computed tomography, and radionuclide scans is also briefly discussed... - Radiologic mimics of cirrhosisPriyanka Jha
Department of Radiology, University of California, San Francisco, 505 Parnassus Ave, Box 0628, M 372, San Francisco, CA 94143 0628, USA
AJR Am J Roentgenol 194:993-9. 2010.... - Evaluation of the biliary intestinal limb of a Roux-en-Y choledochojejunostomy using computed tomographic cholangiographyBenjamin M Yeh
Department of Radiology, University of California, San Francisco, CA 94143 0628, USA
J Comput Assist Tomogr 32:886-9. 2008..We conclude that CT cholangiography may help clarify the status of a Roux-en-Y choledochojejunostomy... - The negative appendectomy rate: who benefits from preoperative CT?Emily M Webb
Department of Radiology, University of California, San Francisco, M372, Box 0628, 505 Parnassus Ave, San Francisco, CA 94143 0628, USA
AJR Am J Roentgenol 197:861-6. 2011..The purpose of this article is to determine the negative appendectomy rates of patients who did and did not undergo preoperative CT and to determine, more specifically, whether men benefit from preoperative CT... - Appendiceal wall thickening at CT in asymptomatic patients with extraintestinal malignancy may mimic appendicitisEmily M Webb
Department of Radiology, University of California San Francisco, San Francisco, CA 94143 0628, USA
Clin Imaging 33:200-3. 2009..This potential mimic of appendicitis may occur in up to 2% of cancer patients. Awareness of this pitfall is important to avoid unnecessary laparotomy in this patient population... - Local staging of prostate cancer: comparative accuracy of T2-weighted endorectal MR imaging and transrectal ultrasoundAdam J Jung
Department of Radiology and Biomedical Imaging, University of California San Francisco, 505 Parnassus Ave, San Francisco, CA 94143 0628, USA
Clin Imaging 36:547-52. 2012..The objective of this study was to compare the accuracy of T2-weighted magnetic resonance (MR) imaging and transrectal ultrasound (TRUS) for staging of prostate cancer... - Abdominal complications of chemotherapy: findings at computed tomographyYueyi I Liu
Department of Radiology, University of California San Francisco, CA 94143 0628, USA
Clin Imaging 36:54-60. 2012..This article describes the CT findings that may be seen in abdominal complications of contemporary chemotherapy. Knowledge of the varying CT appearances that can be encountered may facilitate both diagnosis and management in such cases... - Magnetic resonance imaging of hepatocellular carcinoma mimicking focal nodular hyperplasia: a potential pitfall in patients with cirrhosis?Olga Rafaelian
Department of Radiology, University of California San Francisco, San Francisco, CA 94143 0628, USA
J Comput Assist Tomogr 30:796-9. 2006..Recognition that hepatocellular carcinoma may mimic focal nodular hyperplasia in patients with cirrhosis may prevent misdiagnosis and allow for earlier intervention... - Multi-detector row computed tomographic appearance of celiac gangliaZhen J Wang
Department of Radiology, University of California, San Francisco, San Francisco, CA 94143 0628, USA
J Comput Assist Tomogr 34:343-7. 2010..To assess the imaging features of celiac ganglia on multi-detector row computed tomography (MDCT)... - CT differentiation of adenomyomatosis and gallbladder cancerBrian H Ching
Department of Radiology, University of California, San Francisco, 505 Parnassus Ave, Box 0628, Room M372, San Francisco, CA 94143 0628, USA
AJR Am J Roentgenol 189:62-6. 2007..The purpose of this study was to determine the accuracy of CT in differentiating adenomyomatosis from gallbladder cancer... - MRI of adnexal masses in pregnancyNicholas A Telischak
Department of Radiology, University of California, San Francisco, Box 0628, Rm M 372, 505 Parnassus Ave, San Francisco, CA 94143 0628, USA
AJR Am J Roentgenol 191:364-70. 2008..Accordingly, MRI should be considered as a useful adjunct when sonography is inconclusive or insufficient to guide management of adnexal masses discovered in pregnancy... - Frequency and etiology of solitary hot spots in the pelvis at whole-body positron emission tomography/computed tomography imagingSara Khademi
Department of Radiology, University of California San Francisco, San Francisco, CA 94143 0628, USA
Clin Imaging 33:44-8. 2009..To determine the frequency and etiology of a single hypermetabolic focus within the pelvis with no other areas of increased 18-fluorodeoxyglucose (FDG) uptake in the reminder of the whole body in an oncological population... - CT and MRI of early intrauterine pregnancyDavid S Shin
Department of Radiology, University of California, San Francisco, 505 Parnassus Ave, Box 0628, M 372, San Francisco, CA 94143 0628, USA
AJR Am J Roentgenol 196:325-30. 2011..CONCLUSION: Early pregnancy should be considered when CT or MRI shows a fluid-filled cystlike structure in the uterus of a woman of reproductive age especially if there is a coexistent ovarian corpus luteum cyst... - Can CT features differentiate between inferior vena cava leiomyosarcomas and primary retroperitoneal masses?Emily M Webb
Department of Radiology and Biomedical Imaging, University of California San Francisco, 505 Parnassus Ave, Box 0628, M 372, San Francisco, CA 94143 0628, USA
AJR Am J Roentgenol 200:205-9. 2013..The objective of our study was to evaluate and describe CT features that may differentiate inferior vena cava (IVC) leiomyosarcomas from primary retroperitoneal masses... - Fetal tracheolaryngeal airway obstruction: prenatal evaluation by sonography and MRIJesse Courtier
Department of Radiology, University of California San Francisco, Box 0628, M 372, 505 Parnassus Ave, San Francisco, CA 94143 0628, USA
Pediatr Radiol 40:1800-5. 2010..Accurate distinction of these conditions by sonography or MRI can help facilitate parental counseling and management, including the decision to utilize the ex utero intrapartum treatment (EXIT) procedure... - Predicting biliary complications in right lobe liver transplant recipients according to distance between donor's bile duct and corresponding hepatic arteryBenjamin M Yeh
Department of Radiology, University of California San Francisco, Box 0628, C 324C, 505 Parnassus Ave, San Francisco, CA 94143 0628, USA
Radiology 242:144-51. 2007..To retrospectively determine whether biliary complications in recipients of living-donor right lobe liver grafts can be predicted at pretransplantation donor computed tomography (CT)... - CT and MRI of congenital anomalies of the seminal vesiclesSandeep S Arora
Department of Radiology, University of California, San Francisco, 505 Parnassus Ave, Rm M 372, Box 0628, San Francisco, CA 94143 0628, USA
AJR Am J Roentgenol 189:130-5. 2007..MRI is a better tool for accurately defining anatomic relationships when one is planning to excise a seminal vesicle cyst or if one is considering a difficult differential diagnosis... - Radiological imaging of patients with suspected urinary tract stones: national trends, diagnoses, and predictorsAntonio C Westphalen
Department of Radiology and Biomedical Imaging, University of California at San Francisco, USA
Acad Emerg Med 18:699-707. 2011.... - Factors associated with weight loss after gastric bypassGuilherme M Campos
Department of Surgery, University of California, San Francisco, 521 Parnassus Ave, Room C 341, San Francisco, CA 94143 0790, USA
Arch Surg 143:877-883; discussion 884. 2008..However, weight loss is poor in 10% to 15% of patients. We sought to determine the independent factors associated with poor weight loss after GBP... - Multiparametric 3T endorectal mri after external beam radiation therapy for prostate cancerAntonio C Westphalen
Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA, USA
J Magn Reson Imaging 36:430-7. 2012..To determine the best combination of magnetic resonance imaging (MRI) parameters for the detection of locally recurrent prostate cancer after external beam radiation therapy... - Colonoscopy after CT diagnosis of diverticulitis to exclude colon cancer: a systematic literature reviewVictor F Sai
Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA 94143, USA
Radiology 263:383-90. 2012..To estimate the prevalence of underlying adenocarcinoma of the colon in patients in whom acute diverticulitis was diagnosed at computed tomography (CT) and to compare that to the prevalence of colon cancer in the general population... - Colonic wall redundancy at CT in patients with cystic fibrosisEmily M Webb
Department of Radiology, Section of Pulmonary and Critical Care, University of California San Francisco, M372, Box 0628, 505 Parnassus Ave, San Francisco, CA 94143 0628, USA
Radiology 248:869-75. 2008..To describe the appearance, prevalence, and possible associations of colonic wall redundancy in patients with cystic fibrosis (CF)... - Liver steatosis: investigation of opposed-phase T1-weighted liver MR signal intensity loss and visceral fat measurement as biomarkersManisha Bahl
Department of Radiology, University of California, San Francisco, Box 0628, L 307, 505 Parnassus Ave, San Francisco, CA 94143 0628, USA
Radiology 249:160-6. 2008.... - Risk of catecholamine crisis in patients undergoing resection of unsuspected pheochromocytomaGina Song
Department of Radiology, University of California, San Francisco, CA, USA
Int Braz J Urol 37:35-40;discussion 40-1. 2011..To report the risk of catecholamine crisis in patients undergoing resection of unsuspected pheochromocytoma... - Perforation of the IVC: rule rather than exception after longer indwelling times for the Günther Tulip and Celect retrievable filtersJeremy C Durack
Department of Radiology and Biomedical Imaging, University of California, San Francisco, 505 Parnassus Avenue, M361, San Francisco, CA 94143 0628, USA
Cardiovasc Intervent Radiol 35:299-308. 2012..This study was designed to assess the incidence, magnitude, and impact upon retrievability of vena caval perforation by Günther Tulip and Celect conical inferior vena cava (IVC) filters on computed tomographic (CT) imaging... - Role of CT and MR imaging in predicting optimal cytoreduction of newly diagnosed primary epithelial ovarian cancerAliya Qayyum
Department of Radiology, University of San Francisco, 505 Parnassus Avenue, San Francisco, CA 94143 0628, USA
Gynecol Oncol 96:301-6. 2005..To determine the relative accuracy of CT or MR imaging in the detection of inoperable tumor sites prior to cytoreductive surgery in a large series of patients with newly diagnosed primary epithelial ovarian cancer... - Portomesenteric venous thrombosis after laparoscopic surgery: a systematic literature reviewAaron W James
Department of Surgery, University of California, San Francisco, San Francisco, CA 94143 0790, USA
Arch Surg 144:520-6. 2009....