Clinical Focus

  • Diagnostic Radiology

Professional Education

  • Board Certification: American Board of Radiology, Diagnostic Radiology (2018)
  • Fellowship: Stanford University Radiology Fellowships (2018) CA
  • Residency: Maricopa Medical Center Radiology Residency (2017) AZ
  • Internship: Temple University Hospital General Surgery Residency (2013) PA
  • Medical Education: Temple University School of Medicine Registrar (2012) PA


All Publications

  • How Often is the Dynamic Contrast Enhanced Score Needed in PI-RADS Version 2? Current problems in diagnostic radiology Roh, A. T., Fan, R. E., Sonn, G. A., Vasanawala, S. S., Ghanouni, P., Loening, A. M. 2019


    BACKGROUND: Prostate imaging reporting and data system version 2 (PI-RADS v2) relegates dynamic contrast enhanced (DCE) imaging to a minor role. We sought to determine how often DCE is used in PI-RADS v2 scoring.MATERIALS AND METHODS: We retrospectively reviewed data from 388 patients who underwent prostate magnetic resonance imaging and subsequent biopsy from January 2016 through December 2017. In accordance with PI-RADS v2, DCE was deemed necessary if a peripheral-zone lesion had a diffusion-weighted imaging score of 3, or if a transition-zone lesion had a T2 score of 3 and diffusion-weighted imaging experienced technical failure. Receiver operating characteristic curve analysis assessed the accuracy of prostate-specific antigen density (PSAD) at different threshold values for differentiating lesions that would be equivocal with noncontrast technique. Accuracy of PSAD was compared to DCE using McNemar's test.RESULTS: Sixty-nine lesions in 62 patients (16%) required DCE for PI-RADS scoring. Biopsy of 10 (14%) of these lesions showed clinically significant cancer (Gleason score ?7). In the subgroup of patients with equivocal lesions, those with clinically significant cancer had significantly higher PSADs than those with clinically insignificant lesions (means of 0.18 and 0.13 ng/mL/mL, respectively; P= 0.038). In this subgroup, there was no statistical difference in accuracy in determining clinically significant cancer between a PSAD threshold value of 0.13 and DCE (P= 0.25).CONCLUSIONS: Only 16% of our patients needed DCE to generate the PI-RADS version 2 score, raising the possibility of limiting the initial screening prostate MRI to a noncontrast exam. PSAD may also be used to further decrease the need for or to replace DCE altogether.

    View details for DOI 10.1067/j.cpradiol.2019.05.008

    View details for PubMedID 31126664

  • Comparison of End-Expiration Versus End-Inspiration Breath-Holds With Respect to Respiratory Motion Artifacts on TI-Weighted Abdominal MRI AMERICAN JOURNAL OF ROENTGENOLOGY Vu, K., Haldipur, A. G., Roh, A., Lindholm, P., Loening, A. 2019; 212 (5): 1024?29
  • View-Sharing Artifact Reduction With Retrospective Compressed Sensing Reconstruction in the Context of Contrast-Enhanced Liver MRI for Hepatocellular Carcinoma (HCC) Screening JOURNAL OF MAGNETIC RESONANCE IMAGING Shaikh, J., Stoddard, P. B., Levine, E. G., Roh, A. T., Saranathan, M., Chang, S. T., Muelly, M. C., Hargreaves, B. A., Vasanawala, S. S., Loening, A. M. 2019; 49 (4): 984?93

    View details for DOI 10.1002/jmri.26276

    View details for Web of Science ID 000461233600007

  • Conical ultrashort echo time (UTE) MRI in the evaluation of pediatric acute appendicitis ABDOMINAL RADIOLOGY Roh, A. T., Xiao, Z., Cheng, J. Y., Vasanawala, S. S., Loening, A. M. 2019; 44 (1): 22?30

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