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14 years of experience
Accepting new patients
Video profile


Education ?

Medical School Score Rankings
New York University (1998)
Top 25%

Awards & Distinctions ?

Thomas Jefferson University Jefferson Medical College
American Board of Radiology

Affiliations ?

Dr. Gorniak is affiliated with 3 hospitals.

Hospital Affiliations



  • Thomas Jefferson University Hospital
    111 S 11th St, Philadelphia, PA 19107
    Top 25%
  • Methodist Hospital
    2301 S Broad St, Philadelphia, PA 19148
    Top 50%
  • Methodist Hospital Division of Thomas Jefferson University Hospital
  • Publications & Research

    Dr. Gorniak has contributed to 8 publications.
    Title The Relative Effect of Vendor Variability in Ct Perfusion Results: a Method Comparison Study.
    Date September 2011
    Journal Ajr. American Journal of Roentgenology

    There are known interoperator, intraoperator, and intervendor software differences that can influence the reproducibility of quantitative CT perfusion values. The purpose of this study was to determine the relative impact of operator and software differences in CT perfusion variability.

    Title Advanced Imaging Applications for Endovascular Procedures.
    Date December 2009
    Journal Neurosurgery Clinics of North America

    Advanced imaging techniques, particularly in CT and MRI, have become state-of-the-art to support the performance of interventional neuroradiologic procedures. Multidetector CT scanners with submillimeter detectors and real-time workstations have allowed the use of a noninvasive study, CT angiography, as a first-line diagnostic study at many institutions to detect and evaluate the morphology of aneurysms. Follow-up for postsubarachnoid spasm now includes transcranial Doppler, CT angiography, and sometimes perfusion to guide therapy. While both intracranial and extracranial stenosis have long been well evaluated by MR and CT angiography, information about the intimal wall and plaque morphology is now possible. In the setting of acute ischemia, CT with perfusion or MR with diffusion and perfusion has increased the ability to separate territory at risk from infarcted tissue, and can help to guide more appropriate intervention. This article addresses current state-of the-art imaging applications as well as a few techniques on the horizon that show great promise in helping to characterize those lesions amenable to endovascular therapy.

    Title Mr Imaging of Human Herpesvirus-6-associated Encephalitis in 4 Patients with Anterograde Amnesia After Allogeneic Hematopoietic Stem-cell Transplantation.
    Date August 2006
    Journal Ajnr. American Journal of Neuroradiology

    MR imaging is typically obtained during the work-up of patients who have undergone allogeneic hematopoietic stem-cell transplant who present with unexplained change in mental status, amnesia, or seizures. Although the differential diagnosis is broad in this setting, the presence of T2 prolongation limited to the medial aspect of one or both temporal lobes with or without associated reduced water diffusion may help limit the possible diagnoses. A frequent etiology seen in this context is human herpesvirus-6 (HHV6) infection. We report the evolution of MR imaging findings and clinical course in 4 patients with limbic encephalitis probably related to HHV6.

    Title Evaluation of a Semiautomatic 3d Fusion Technique Applied to Molecular Imaging and Mri Brain/frame Volume Data Sets.
    Date April 2003
    Journal Journal of Medical Systems

    A generally applicable 3D fusion method was evaluated using molecular imaging and MRI volumetric data sets from 15 brain tumor patients with stereotactic frames attached to their skull. Point pairs, placed on the frame only, were chosen, polynomial warping coefficients were generated to map voxels from one coordinate space to the other. The MRI frame was considered the reference structure and the standard for "correct" registration. An ANOVA test (p > 0.05) confirmed the point pair choice to be consistent. The 95% confidence interval for the t-test showed the measured distance difference between the registered volumes was within one MRI voxel. A further experiment was conducted to independently evaluate the brain registration based on testing for consistency of randomly selected interior/exterior points. A t-test result (p < 0.05) showed that the consistency (i.e., both interior or both exterior) before and after volume registration were significantly different. This fusion method may be a viable alternative when other methods fail.

    Title Graphical 3d Medical Image Registration and Quantification.
    Date January 1998
    Journal Journal of Medical Systems

    We present a graphical three-dimensional method that facilitates image registration and fusion, and provides quantitative geometric and volume information. In particular it enhances the use of functional (radiopharmaceutical) imaging (SPECT, PET) which, though a powerful clinical tool, has the disadvantage of low spatial resolution and ill-defined boundaries. Registration between functional images and structural images (MRI, CT) can augment the anatomical context of these functional images.

    Title Thallium-201 Uptake in Cytomegalovirus Encephalitis.
    Date September 1997
    Journal Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine

    A 36-yr-old man with AIDS exhibited intense 201Tl uptake (lesion-to-brain uptake ratio 5.38) in a brain lesion previously detected by MRI and CT. The lesion was biopsied and found to contain cells with viral inclusions diagnostic of cytomegalovirus infection, not tumor as the thallium SPECT results suggested. Thallium-201 SPECT may be less specific than previously reported for differentiating neoplastic disease from opportunistic infections in AIDS patients.

    Title Three-dimensional Us and Volumetric Assessment of the Prostate.
    Date July 1994
    Journal Radiology

    The authors demonstrate a method for constructing three-dimensional (3D) images of the prostate based on standard two-dimensional ultrasonic (US) images. Transverse US images of the prostate in six patients (aged 61-83 years) and 10 water-filled balloon phantoms were recorded at video rates by manually withdrawing a biplane transrectal probe at a constant speed. Data acquisition time of the images was less than a minute. Typically, 50-70 scans of 0.2-0.5-mm-thick cross sections were acquired. Postprocessing of these data enabled lifelike 3D visualization of the gland and accurate measurement of its volume.

    Title Radiology Report Comparator: a Novel Method to Augment Resident Education.
    Journal Journal of Digital Imaging : the Official Journal of the Society for Computer Applications in Radiology

    Attending radiologists routinely edit radiology trainee dictated preliminary reports as part of standard workflow models. Time constraints, high volume, and spatial separation may not always facilitate clear discussion of these changes with trainees. However, these edits can represent significant teaching moments that are lost if they are not communicated back to trainees. We created an electronic method for retrieving and displaying changes made to resident written preliminary reports by attending radiologists during the process of radiology report finalization. The Radiology Information System is queried. Preliminary and final radiology reports, as well as report metadata, are extracted and stored in a database indexed by accession number and trainee/radiologist identity. A web application presents to trainees their 100 most recent preliminary and final report pairs both side by side and in a "track changes" mode. Web utilization audits showed regular utilization by trainees. Surveyed residents stated they compared reports for educational value, to improve future reports, and to improve patient care. Residents stated that they compared reports more frequently after deployment of this software solution and that regular assessment of their work using the Report Comparator allowed them to routinely improve future report quality and improved radiological understanding. In an era with increasing workload demands, trainee work hour restrictions, and decentralization of department resources (e.g., faculty, PACS), this solution helps to retain an important part of the educational experience that would have otherwise run the risk of being lost and provides it to the trainees in an efficient and highly consumable manner.

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