Ranish Khawaja, MD
Assistant Professor, Radiology

  • Duke University Hospital Program, Cardiothoracic Radiology (2021)
Languages: English, Urdu
Department: Radiology

Professional Titles

  • Cardiothoracic Radiologist


  • Schwartz FR, Khawaja RDA, Marin D, Patel BN, Gray AL, Reynolds JM, Koweek LH. Split-Bolus, Single-Acquisition, Dual-Phase Abdominopelvic CT Angiography for the Evaluation of Lung Transplant Candidates: Image Quality and Resource Utilization. AJR Am J Roentgenol. 2020 Dec;215(6):1520-1527. PubMed PMID: 33052735
  • Ali Khawaja RD, Singh S, Padole A, Otrakji A, Lira D, Zhang D, Liu B, Primak A, Xu G, Kalra MK. Point Organ Radiation Dose in Abdominal CT: Effect of Patient Off-Centering in an Experimental Human Cadaver Study. Radiat Prot Dosimetry. 2017 Aug 1;175(4):440-449. PubMed PMID: 28074019
  • Padole A, Deedar Ali Khawaja R, Otrakji A, Zhang D, Liu B, Xu XG, Kalra MK. Comparison of Measured and Estimated CT Organ Doses for Modulated and Fixed Tube Current:: A Human Cadaver Study. Acad Radiol. 2016 May;23(5):634-42. PubMed PMID: 26852248
  • Padole A, Sainani N, Lira D, Khawaja RD, Pourjabbar S, Lo Gullo R, Otrakji A, Kalra MK. Assessment of sub-milli-sievert abdominal computed tomography with iterative reconstruction techniques of different vendors. World J Radiol. 2016 Jun 28;8(6):618-27. PubMed PMID: 27358690
  • Khawaja RDA, Singh S, Blake M, Harisinghani M, Choy G, Karaosmanoglu A, Padole A, Do S, Brown K, Thompson R, Morton T, Raihani N, Koehler T, Kalra MK. Corrigendum to "Ultra-low dose abdominal MDCT: Using a knowledge-based Iterative Model Reconstruction technique for substantial dose reduction in a prospective clinical study" [Eur. J. Radiol. 84 (2015) 2-10]. Eur J Radiol. 2016 Jan;85(1):310. PubMed PMID: 28676321
  • Karaosmanoglu AD, Khawaja RD, Onur MR, Kalra MK. CT and MRI of aortic coarctation: pre- and postsurgical findings. AJR Am J Roentgenol. 2015 Mar;204(3):W224-33. PubMed PMID: 25714305
  • Wang Y, Lim R, Ali Khawaja RD, Blake MA. Improving Concordance of MRI and PET/CT Interpretations With Retrospectively Coregistered MRI and PET/CT Data Sets. Curr Probl Diagn Radiol. 2015 May-Jun;44(3):232-6. PubMed PMID: 25745822
  • Pourjabbar S, Singh S, Kulkarni N, Muse V, Digumarthy SR, Khawaja RD, Padole A, Do S, Kalra MK. Dose reduction for chest CT: comparison of two iterative reconstruction techniques. Acta Radiol. 2015 Jun;56(6):688-95. PubMed PMID: 24948790
  • Khawaja RD, Singh S, Blake M, Harisinghani M, Choy G, Karaosmanoglu A, Padole A, Pourjabbar S, Do S, Kalra MK. Ultralow-Dose Abdominal Computed Tomography: Comparison of 2 Iterative Reconstruction Techniques in a Prospective Clinical Study. J Comput Assist Tomogr. 2015 Jul-Aug;39(4):489-98. PubMed PMID: 26182223
  • Padole A, Singh S, Lira D, Blake MA, Pourjabbar S, Khawaja RD, Choy G, Saini S, Do S, Kalra MK. Assessment of Filtered Back Projection, Adaptive Statistical, and Model-Based Iterative Reconstruction for Reduced Dose Abdominal Computed Tomography. J Comput Assist Tomogr. 2015 Jul-Aug;39(4):462-7. PubMed PMID: 25734468
  • Khawaja RD, Singh S, Otrakji A, Padole A, Lim R, Nimkin K, Westra S, Kalra MK, Gee MS. Dose reduction in pediatric abdominal CT: use of iterative reconstruction techniques across different CT platforms. Pediatr Radiol. 2015 Jul;45(7):1046-55. PubMed PMID: 25427434
  • Khawaja RD, Singh S, Vettiyil B, Lim R, Gee M, Westra S, Kalra MK. Simplifying size-specific radiation dose estimates in pediatric CT. AJR Am J Roentgenol. 2015 Jan;204(1):167-76. PubMed PMID: 25539253
  • Khawaja RDA, Singh S, Blake M, Harisinghani M, Choy G, Karosmangulu A, Padole A, Do S, Brown K, Thompson R, Morton T, Raihani N, Koehler T, Kalra MK. Ultra-low dose abdominal MDCT: using a knowledge-based Iterative Model Reconstruction technique for substantial dose reduction in a prospective clinical study. Eur J Radiol. 2015 Jan;84(1):2-10. PubMed PMID: 25458225
  • Lo Gullo R, Mishra S, Lira DA, Padole A, Otrakji A, Khawaja RD, Pourjabbar S, Singh S, Shepard JA, Digumarthy SR, Kalra MK, Stone JR. Quantification of interstitial fluid on whole body CT: comparison with whole body autopsy. Forensic Sci Med Pathol. 2015 Dec;11(4):488-96. PubMed PMID: 26541472
  • Padole A, Ali Khawaja RD, Kalra MK, Singh S. CT radiation dose and iterative reconstruction techniques. AJR Am J Roentgenol. 2015 Apr;204(4):W384-92. PubMed PMID: 25794087
  • Khawaja RD, Singh S, Lira D, Bippus R, Do S, Padole A, Pourjabbar S, Koehler T, Shepard JA, Kalra MK. Role of compressive sensing technique in dose reduction for chest computed tomography: a prospective blinded clinical study. J Comput Assist Tomogr. 2014 Sep-Oct;38(5):760-7. PubMed PMID: 24834892
  • Zhang D, Padole A, Li X, Singh S, Khawaja RD, Lira D, Liu T, Shi JQ, Otrakji A, Kalra MK, Xu XG, Liu B. In vitro dose measurements in a human cadaver with abdomen/pelvis CT scans. Med Phys. 2014 Sep;41(9):091911. PubMed PMID: 25186398
  • Fatimi SH, Khawaja RD, Majid Z. Giant osteosarcoma of chest wall requiring resection and pneumonectomy. Asian Cardiovasc Thorac Ann. 2014 Sep;22(7):875-7. PubMed PMID: 24887861
  • Padole A, Singh S, Ackman JB, Wu C, Do S, Pourjabbar S, Khawaja RD, Otrakji A, Digumarthy S, Shepard JA, Kalra M. Submillisievert chest CT with filtered back projection and iterative reconstruction techniques. AJR Am J Roentgenol. 2014 Oct;203(4):772-81. PubMed PMID: 25247943
  • Khawaja RD, Singh S, Madan R, Sharma A, Padole A, Pourjabbar S, Digumarthy S, Shepard JA, Kalra MK. Ultra low-dose chest CT using filtered back projection: comparison of 80-, 100- and 120 kVp protocols in a prospective randomized study. Eur J Radiol. 2014 Oct;83(10):1934-44. PubMed PMID: 25063211
  • Khawaja RD, Singh S, Gilman M, Sharma A, Do S, Pourjabbar S, Padole A, Lira D, Brown K, Shepard JA, Kalra MK. Computed tomography (CT) of the chest at less than 1 mSv: an ongoing prospective clinical trial of chest CT at submillisievert radiation doses with iterative model image reconstruction and iDose4 technique. J Comput Assist Tomogr. 2014 Jul-Aug;38(4):613-9. PubMed PMID: 24651746
  • Pourjabbar S, Singh S, Sharma A, Padole A, Khawaja RD, Lira D, Kalra MK. What is the minimal radiation dose that can be used for detecting pleural effusion?. AJR Am J Roentgenol. 2014 Jul;203(1):118-22. PubMed PMID: 24951204
  • Singh S, Kalra MK, Ali Khawaja RD, Padole A, Pourjabbar S, Lira D, Shepard JA, Digumarthy SR. Radiation dose optimization and thoracic computed tomography. Radiol Clin North Am. 2014 Jan;52(1):1-15. PubMed PMID: 24267707
  • Ali Khawaja RD, Akhtar W, Khawaja A, Irfan H, Naeem M, Memon M. Patient communication in radiology: current status of breaking bad news among radiologists and radiology trainees in Pakistan. J Coll Physicians Surg Pak. 2013 Oct;23(10):761-3. PubMed PMID: 24112271
  • Singh S, Khawaja RD, Pourjabbar S, Padole A, Lira D, Kalra MK. Iterative image reconstruction and its role in cardiothoracic computed tomography. J Thorac Imaging. 2013 Nov;28(6):355-67. PubMed PMID: 24149861
  • Lim R, Khawaja RD, Nimkin K, Sagar P, Shailam R, Gee MS, Westra SJ. Relationship between radiologist training level and fluoroscopy time for voiding cystourethrography. AJR Am J Roentgenol. 2013 Mar;200(3):645-51. PubMed PMID: 23436857
  • Fatimi SH, Khawaja A, Ali Khawaja RD, Hoda M, Bhimani SA. Benign granulomatous polyp obstructing the bronchus. J Coll Physicians Surg Pak. 2013 Jul;23(7):519-21. PubMed PMID: 23823964
  • Fatimi SH, Khawaja RD, Majid Z, Sohail S, Kamal M. Massive haemoptysis as an unusual symptom in a patient with papillary thyroid carcinoma. Ther Adv Endocrinol Metab. 2013 Dec;4(6):173-5. PubMed PMID: 24324857
  • Saleem AF, Ali Khawaja RD, Shaikh AS, Ali SA, Mehdi Zaidi AK. Severe combined immune deficiency syndrome. J Coll Physicians Surg Pak. 2013 Aug;23(8):570-3. PubMed PMID: 23930874
  • Nadeem N, Khawaja RD, Beg M, Naeem M, Majid Z. Undergraduate radiology education in private and public teaching hospitals in Karachi, Pakistan: teaching duties, methodologies, and rewards. Adv Med Educ Pract. 2013;4:31-7. PubMed PMID: 23745098
  • Khawaja RA, Sikander R, Khawaja AA, Jareno RJ, Halepota AT. Medically certified sickness absence among health care workers. J Pak Med Assoc. 2012 Sep;62(9):900-4. PubMed PMID: 23139972
  • Fatimi SH, Bhimani SA, Deedar-Ali-Khawaja R, Khawaja A. Imaging and intervention for coronary artery disease following irradiation of malignant thymoma. J Pak Med Assoc. 2012 Nov;62(11):1248-50. PubMed PMID: 23866423
  • Khawaja RD, Akhtar W, Khawaja A. Role of regional, cultural, and sex differences in delivering bad news in clinical radiology: evidence from a developing country. AJR Am J Roentgenol. 2012 Feb;198(2):W195-6. PubMed PMID: 22268213
  • Jafferani A, Malik A, Khawaja RD, Sheikh L, Sharif H. Surgical management of valvular heart diseases in pregnancy. Eur J Obstet Gynecol Reprod Biol. 2011 Nov;159(1):91-4. PubMed PMID: 21839576
  • Deedar-Ali-Khawaja R. Vanishing surgeons: cultural, economical, and social limitations for Pakistani medical students and trainees. Am Surg. 2011 Mar;77(3):368. PubMed PMID: 21375858
  • Fatimi SH, Deedar-Ali-Khawaja R, Kiani SK. Imaging and intervention of paraneoplastic effect of a right atrial myxoma on factor VII activity levels. Ann Thorac Surg. 2011 Jan;91(1):278-81. PubMed PMID: 21172532
  • Deedar-Ali-Khawaja R, Jahan F. Rekindling the interest of primary care specialties among medical students of a developing country: perspective from Pakistani medical education systems. J Pak Med Assoc. 2011 Dec;61(12):1257-8. PubMed PMID: 22355986
  • Deedar-Ali-Khawaja R, Fatimi SH, Shahabuddin S. Epithelioid hemangioendothelioma of axillary vein: an imminent vascular tumor?. Am Surg. 2010 Sep;76(9):E176-7. PubMed PMID: 21396278
  • Deedar-Ali-Khawaja R, Fatimi SH, Naeem M, Haque S. Dysphagia secondary to malignant tuberculous lymphadenopathy: role of video-assisted thoracoscopic surgery in a developing country. Am Surg. 2010 Nov;76(11):E218-9. PubMed PMID: 21375823
  • Fatimi SH, Deedar-Ali-Khawaja R. Catamenial pneumothorax associated with ascites, eosinophilic pleural effusion, and relatively low glucose content. Am Surg. 2010 Nov;76(11):E212-3. PubMed PMID: 21375820
  • Deedar-Ali-Khawaja R, Fatimi SH, Zaidi M. Imaging and intervention of traumatic right upper lobe bronchial avulsion. Am Surg. 2010 Nov;76(11):E201-2. PubMed PMID: 21375815
  • Pervez S, Khawaja RD. Mediastinal lymphomas: primary mediastinal (thymic) large B-cell lymphoma versus classical Hodgkin lymphoma, histopathologic dilemma solved?. Pathol Res Pract. 2010 Jun 15;206(6):365-7. PubMed PMID: 20185248
  • Deedar-Ali-Khawaja R, Khan SM. Trends of surgical career selection among medical students and graduates: a global perspective. J Surg Educ. 2010 Jul-Aug;67(4):237-48. PubMed PMID: 20816360
  • Fatimi SH, Deedar-Ali-Khawaja R, Niazi SK, Luqman Z. Late concomitant pseudoaneurysm and arteriovenous fistula of the subclavian artery: a developing country perspective. Vasc Endovascular Surg. 2010 Aug;44(6):503-5. PubMed PMID: 20519279
  • Deedar-Ali-Khawaja R, Chawla T, Shakoor A. Women in surgery: possible interventions at medical school?. Singapore Med J. 2010 Dec;51(12):974-5. PubMed PMID: 21221506
View All (45 Total) View Less

Professional Memberships

  • Radiological Society of North America, Member

Practice Locations

UCHealth University of Colorado Hospital (UCH)
12605 E. 16th Ave
Aurora, CO 80045

Specialty Information

  • Diagnostic, Board Certification
  • Colorado Medical License, License (2021)

General Information

Residency Programs:
  • Duke University Hospital Program, Cardiothoracic Radiology (2021)
Languages: English, Urdu
Department: Radiology
Contact Us
CU Anschutz
Fitzsimons Building

13001 East 17th Place
Campus Box C290
Aurora, CO 80045

Update My Profile