Ahmed Firas

Firas S. Ahmed, MD, MPH



Associate Attending Radiologist

Clinical Expertise

Body Imaging, Genitourinary Imaging, Hepatobiliary and Pancreatic Imaging, Virtual CT Colonography.


Contact and Location

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Memorial Sloan Kettering has locations throughout New York City, Long Island, New Jersey, and Westchester. These locations offer many services, including screening, chemotherapy, and medical testing.

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About Me


MD, University of Baghdad-College of Medicine


Diagnostic Radiology, Columbia University/New York-Presbyterian Hospital


Abdominal Imaging and Intervention, Harvard University/Brigham and Women’s Hospital

Board Certifications


I am a board-certified radiologist with expertise in abdominopelvic imaging. I have experience in a variety of medical imaging methods, including computed tomography (CT) scan, magnetic resonance imaging (MRI), ultrasound, plain radiography, and virtual colonoscopy (also known as CT colonography).

Throughout my residency, fellowship, and post-fellowship practice, I focused on cancer imaging, given its pivotal role in detecting cancer, measuring its extent within the body, assessing response to therapy, and post-remission surveillance.

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In my work at Memorial Sloan Kettering Cancer Center, I collaborate closely with surgeons, oncologists, and other clinicians to evaluate patients with cancer. I have a deep understanding of just how important it is for the radiologist to be vigilant and thorough, especially in cancer imaging, where subtle changes across exams can reflect tumor response or resistance to therapy. The radiologist’s awareness of these small but important details can help treating clinicians make an early, needed decision to change the patient’s treatment protocol.

My cancer imaging research focuses on radiomics (mineable data from medical imaging) and other quantitative imaging techniques. In my studies, I strive to utilize quantitative imaging parameters (already obtained with each scan) that cannot be seen by the human eye but can help provide further information about the nature of a tumor and its aggressiveness. Providing this additional information to clinicians may help them make better therapeutic decisions, ultimately helping patients.

Awards and Honors

  • Fulbright Scholarship


Doctors at Memorial Sloan Kettering work as teams, with specialists from all different areas. This allows us to consider all your needs together, and to give you the best possible care.

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Clinical Trials

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Memorial Sloan Kettering's doctors and scientists are constantly developing new treatments for cancer. MSK is typically running hundreds of clinical trials at a given time.

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Research and Publications

Dercle L, Zhao B, Gönen M, Moskowitz CS, Firas A, Beylergil V, Connors DE, Yang H, Lu L, Fojo T, Carvajal R, Karovic S, Maitland ML, Goldmacher GV, Oxnard GR, Postow MA, Schwartz LH. Early Readout on Overall Survival of Patients With Melanoma Treated With Immunotherapy Using a Novel Imaging Analysis. JAMA Oncol. 2022 Mar 1;8(3):385-392. doi: 10.1001/jamaoncol.2021.6818. PMID: 35050320; PMCID: PMC8778619.

Movassaghi M, Ahmed F, Patel H, Luk L, Hyams E, Wenske S, Shaish H. Association of Patient and Imaging-Related Factors With False Negative MRI-Targeted Prostate Biopsies of Suspicious PI-RADS 4 and 5 Lesions. Urology. 2022 Sep;167:165-170. doi: 10.1016/j.urology.2022.04.026. Epub 2022 May 6. PMID: 35533767.

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Lu L, Ahmed FS, Akin O, Luk L, Guo X, Yang H, Yoon J, Hakimi AA, Schwartz LH, Zhao B. Uncontrolled Confounders May Lead to False or Overvalued Radiomics Signature: A Proof of Concept Using Survival Analysis in a Multicenter Cohort of Kidney Cancer. Front Oncol. 2021 May 27;11:638185. doi: 10.3389/fonc.2021.638185. PMID: 34123789; PMCID: PMC8191735.

Ahmed FS, Akin O, Shaish H, Luk L, Guo X, Yang H, Zabor E, Ostrovnaya I, Hakimi AA, Zhao B, Schwartz LH. Nonenhancing Component of Clear Cell Renal Cell Carcinoma on Computed Tomography Correlates With Tumor Necrosis and Stage and Serves as a Size-Independent Prognostic Biomarker. J Comput Assist Tomogr. 2019 Jul/Aug;43(4):628-633. doi: 10.1097/RCT.0000000000000877. PMID: 31162237; PMCID: PMC6629492.

Barr RG, Bluemke DA, Ahmed FS, Carr JJ, Enright PL, Hoffman EA, Jiang R, Kawut SM, Kronmal RA, Lima JA, Shahar E, Smith LJ, Watson KE. Percent emphysema, airflow obstruction, and impaired left ventricular filling. N Engl J Med. 2010 Jan 21;362(3):217-27. doi: 10.1056/NEJMoa0808836. PMID: 20089972; PMCID: PMC2887729.

Publications on PubMed

Visit PubMed for a full listing of Dr. Ahmed’s journal articles. Pubmed is an online index of research papers and other articles from the US National Library of Medicine and the National Institutes of Health.

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