Michael Callahan

Michael J. Callahan, MD

Director, Computed Tomography; Division Chief, Abdominal Imaging; Medical Director, Ultrasound; Staff Radiologist

Associate Professor of Radiology, Harvard Medical School

Medical Services

Specialties

  • Computed Tomography (CT or CAT scan)
  • Dose Reduction
  • Gastrointestinal Radiology

Departments

  • Radiology

Programs

  • Diagnostic Radiology
  • Magnetic Resonance Imaging (MRI)
  • Computed Tomography (CT)
  • Inflammatory Bowel Disease Center
  • Plain X-ray & Fluoroscopy
  • Ultrasound
  • Pancreatic Disorders Program
To schedule an appointment: Call 617-355-6286

Experience and Education

Education

Undergraduate School

Hobart College, 1991

Geneva, NY

Medical School

Upstate Medical University, 1995

Syracuse, NY

Internship

Malden Hospital, 1995-1996

Malden, MA

Residency

Tufts University School of Medicine, 1996-2000

Boston, MA

Fellowship, Pediatric Radiology

Boston Children's Hospital, 2000-2002

Boston, MA

Certifications

  • Radiology, Pediatric Radiology

Professional History

I received my B.S. degree from Hobart College, and my M.D. degree from Upstate Medical University in Syracuse, New York. I completed a diagnostic radiology residency at Tufts Medical Center, and a fellowship in pediatric radiology at Boston Children's Hospital.  I’m currently an associate professor of radiology at Harvard Medical School, medical director of computed tomography, physician director for radiation safety, and division chief of abdominal imaging at Boston Children’s Hospital. My research interests include CT dose optimization, abdominal imaging and musculoskeletal ultrasound.  I am a member of the Image Gently® Steering Committee, and will be the Secretary of the Society for Pediatric Radiology (SPR) from 2016-2019.

Publications

Publications powered by Harvard Catalyst Profiles
  1. Callahan MJ, Talmadge JM, MacDougall RD, Kleinman PL, Taylor GA, Buonomo C. Selecting appropriate gastroenteric contrast media for diagnostic fluoroscopic imaging in infants and children: a practical approach. Pediatr Radiol. 2016 Oct 10.
  2. Kurugol S, Freiman M, Afacan O, Perez-Rossello JM, Callahan MJ, Warfield SK. Spatially-constrained probability distribution model of incoherent motion (SPIM) for abdominal diffusion-weighted MRI. Med Image Anal. 2016 Aug; 32:173-83.
  3. Callahan MJ, Talmadge JM, MacDougall R, Buonomo C, Taylor GA. The Use of Enteric Contrast Media for Diagnostic CT, MRI, and Ultrasound in Infants and Children: A Practical Approach. AJR Am J Roentgenol. 2016 May; 206(5):973-9.
  4. MacDougall RD, Kleinman PL, Callahan MJ. Size-based protocol optimization using automatic tube current modulation and automatic kV selection in computed tomography. J Appl Clin Med Phys. 2016 Jan 08; 17(1):5756.
  5. Chauvin NA, Khwaja A, Epelman M, Callahan MJ. Imaging findings of Hoffa's fat pad herniation. Pediatr Radiol. 2016 Apr; 46(4):508-12.
  6. Taimouri V, Afacan O, Perez-Rossello JM, Callahan MJ, Mulkern RV, Warfield SK, Freiman M. Spatially constrained incoherent motion method improves diffusion-weighted MRI signal decay analysis in the liver and spleen. Med Phys. 2015 Apr; 42(4):1895-903.
  7. Tuttle KS, Vargas SO, Callahan MJ, Bae DS, Nigrovic PA. Enthesitis as a component of dactylitis in psoriatic juvenile idiopathic arthritis: histology of an established clinical entity. Pediatr Rheumatol Online J. 2015; 13:7.
  8. Kurugol S, Freiman M, Afacan O, Domachevsky L, Perez-Rossello JM, Callahan MJ, Warfield SK. Motion Compensated Abdominal Diffusion Weighted MRI by Simultaneous Image Registration and Model Estimation (SIR-ME). Med Image Comput Comput Assist Interv. 2015; 9351:501-9.
  9. Callahan MJ, Servaes S, Lee EY, Towbin AJ, Westra SJ, Frush DP. Practice patterns for the use of iodinated i.v. contrast media for pediatric CT studies: a survey of the Society for Pediatric Radiology. AJR Am J Roentgenol. 2014 Apr; 202(4):872-9.
  10. Brown SD, Callahan MJ, Browning DM, Lebowitz RL, Bell SK, Jang J, Meyer EC. Radiology trainees' comfort with difficult conversations and attitudes about error disclosure: effect of a communication skills workshop. J Am Coll Radiol. 2014 Aug; 11(8):781-7.
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  12. Goske MJ, Strauss KJ, Coombs LP, Mandel KE, Towbin AJ, Larson DB, Callahan MJ, Darge K, Podberesky DJ, Frush DP, Westra SJ, Prince JS. Diagnostic reference ranges for pediatric abdominal CT. Radiology. 2013 Jul; 268(1):208-18.
  13. Kan JH, Guillerman RP, Callahan MJ. Pediatric musculoskeletal imaging: beyond the basics. Pediatr Radiol. 2013 Mar; 43 Suppl 1:S1.
  14. Freiman M, Perez-Rossello JM, Callahan MJ, Voss SD, Ecklund K, Mulkern RV, Warfield SK. Reliable estimation of incoherent motion parametric maps from diffusion-weighted MRI using fusion bootstrap moves. Med Image Anal. 2013 Apr; 17(3):325-36.
  15. Goske MJ, Applegate KE, Bulas D, Butler PF, Callahan MJ, Don S, Farley S, Frush D, Hernanz-Schulman M, John SD, Kaste SC, Kaupp S, McElveny C, Morrison G, Sidhu M, Strauss K, Treves ST. Image Gently 5 years later: what goals remain to be accomplished in radiation protection for children? AJR Am J Roentgenol. 2012 Sep; 199(3):477-9.
  16. Freiman M, Perez-Rossello JM, Callahan MJ, Bittman M, Mulkern RV, Bousvaros A, Warfield SK. Characterization of fast and slow diffusion from diffusion-weighted MRI of pediatric Crohn's disease. J Magn Reson Imaging. 2013 Jan; 37(1):156-63.
  17. Freiman M, Voss SD, Mulkern RV, Perez-Rossello JM, Callahan MJ, Warfield SK. In vivo assessment of optimal b-value range for perfusion-insensitive apparent diffusion coefficient imaging. Med Phys. 2012 Aug; 39(8):4832-9.
  18. Bachur RG, Hennelly K, Callahan MJ, Chen C, Monuteaux MC. Diagnostic imaging and negative appendectomy rates in children: effects of age and gender. Pediatrics. 2012 May; 129(5):877-84.
  19. Newman B, Callahan MJ. Reply to commentary--'CT radiation dose reduction: can we do harm by doing good?'. Pediatr Radiol. 2012 Apr; 42(4):399-401.
  20. Goske MJ, Applegate KE, Bulas D, Butler PF, Callahan MJ, Coley BD, Don S, Frush DP, Hernanz-Schulman M, Kaste SC, Morrison G, Sidhu M, Strauss KJ, Treves ST. Image Gently: progress and challenges in CT education and advocacy. Pediatr Radiol. 2011 Sep; 41 Suppl 2:461-6.
  21. Newman B, Callahan MJ. ALARA (as low as reasonably achievable) CT 2011--executive summary. Pediatr Radiol. 2011 Sep; 41 Suppl 2:453-5.
  22. Callahan MJ. CT dose reduction in practice. Pediatr Radiol. 2011 Sep; 41 Suppl 2:488-92.
  23. Goske MJ, Applegate KE, Bulas D, Butler PF, Callahan MJ, Coley BD, Don S, Farley S, Frush DP, Hernanz-Schulman M, Kaste SC, Morrison G, Sidhu M, Strauss KJ, Treves ST. Approaches to promotion and implementation of action on Radiation Protection for children. Radiat Prot Dosimetry. 2011 Sep; 147(1-2):137-41.
  24. Townsend BA, Callahan MJ, Zurakowski D, Taylor GA. Has pediatric CT at children's hospitals reached its peak? AJR Am J Roentgenol. 2010 May; 194(5):1194-6.
  25. Strauss KJ, Goske MJ, Kaste SC, Bulas D, Frush DP, Butler P, Morrison G, Callahan MJ, Applegate KE. Image gently: Ten steps you can take to optimize image quality and lower CT dose for pediatric patients. AJR Am J Roentgenol. 2010 Apr; 194(4):868-73.
  26. Medeiros F, Callahan MJ, Elvin JA, Dorfman DM, Berkowitz RS, Quade BJ. Intraplacental choriocarcinoma arising in a second trimester placenta with partial hydatidiform mole. Int J Gynecol Pathol. 2008 Apr; 27(2):247-51.
  27. Goske MJ, Applegate KE, Boylan J, Butler PF, Callahan MJ, Coley BD, Farley S, Frush DP, Hernanz-Schulman M, Jaramillo D, Johnson ND, Kaste SC, Morrison G, Strauss KJ, Tuggle N. The Image Gently campaign: working together to change practice. AJR Am J Roentgenol. 2008 Feb; 190(2):273-4.
  28. Goske MJ, Applegate KE, Boylan J, Butler PF, Callahan MJ, Coley BD, Farley S, Frush DP, Hernanz-Schulman M, Jaramillo D, Johnson ND, Kaste SC, Morrison G, Strauss KJ, Tuggle N. The 'Image Gently' campaign: increasing CT radiation dose awareness through a national education and awareness program. Pediatr Radiol. 2008 Mar; 38(3):265-9.
  29. Nagymanyoki Z, Callahan MJ, Parast MM, Berkowitz RS, Mok SC, Fulop V. Overexpression of laminin receptor 1 on decidual cells in partial and complete mole. Gynecol Oncol. 2008 Jan; 108(1):121-5.
  30. Nagymanyoki Z, Callahan MJ, Parast MM, Fulop V, Mok SC, Berkowitz RS. Immune cell profiling in normal pregnancy, partial and complete molar pregnancy. Gynecol Oncol. 2007 Nov; 107(2):292-7.
  31. Callahan MJ, Crum CP, Medeiros F, Kindelberger DW, Elvin JA, Garber JE, Feltmate CM, Berkowitz RS, Muto MG. Primary fallopian tube malignancies in BRCA-positive women undergoing surgery for ovarian cancer risk reduction. J Clin Oncol. 2007 Sep 1; 25(25):3985-90.
  32. Kindelberger DW, Lee Y, Miron A, Hirsch MS, Feltmate C, Medeiros F, Callahan MJ, Garner EO, Gordon RW, Birch C, Berkowitz RS, Muto MG, Crum CP. Intraepithelial carcinoma of the fimbria and pelvic serous carcinoma: Evidence for a causal relationship. Am J Surg Pathol. 2007 Feb; 31(2):161-9.
  33. Medeiros F, Muto MG, Lee Y, Elvin JA, Callahan MJ, Feltmate C, Garber JE, Cramer DW, Crum CP. The tubal fimbria is a preferred site for early adenocarcinoma in women with familial ovarian cancer syndrome. Am J Surg Pathol. 2006 Feb; 30(2):230-6.
  34. Nijs E, Callahan MJ, Taylor GA. Disorders of the pediatric pancreas: imaging features. Pediatr Radiol. 2005 Apr; 35(4):358-73; quiz 457.
  35. Callahan MJ, Taylor GA. CT of the pediatric esophagus. AJR Am J Roentgenol. 2003 Nov; 181(5):1391-6.
  36. Folkins AK, Jarboe EA, Saleemuddin A, Lee Y, Callahan MJ, Drapkin R, Garber JE, Muto MG, Tworoger S, Crum CP. A candidate precursor to pelvic serous cancer (p53 signature) and its prevalence in ovaries and fallopian tubes from women with BRCA mutations. Gynecol Oncol. 2008 May; 109(2):168-73.
  37. Callahan MJ, Rodriguez DP, Taylor GA. CT of appendicitis in children. Radiology. 2002 Aug; 224(2):325-32.
  38. Egloff AM, Lee EY, Dillon JE, Callahan MJ. Desmoplastic small round cell tumor of the kidney in a pediatric patient: sonographic and multiphase CT findings. AJR Am J Roentgenol. 2005 Nov; 185(5):1347-9.
  39. Jarrett DY, Kramer DE, Callahan MJ, Kleinman PK. US diagnosis of pediatric muscle hernias of the lower extremities. Pediatr Radiol. 2013 Mar; 43 Suppl 1:S2-7.
  40. Shah SH, Callahan MJ. Ultrasound evaluation of superficial lumps and bumps of the extremities in children: a 5-year retrospective review. Pediatr Radiol. 2013 Mar; 43 Suppl 1:S23-40.
  41. Kircher MF, Milla S, Callahan MJ. Ingestion of magnetic foreign bodies causing multiple bowel perforations. Pediatr Radiol. 2007 Sep; 37(9):933-6.
  42. Bachur RG, Hennelly K, Callahan MJ, Monuteaux MC. Advanced radiologic imaging for pediatric appendicitis, 2005-2009: trends and outcomes. J Pediatr. 2012 Jun; 160(6):1034-8.
  43. Callahan MJ, Poznauskis L, Zurakowski D, Taylor GA. Nonionic iodinated intravenous contrast material-related reactions: incidence in large urban children's hospital--retrospective analysis of data in 12,494 patients. Radiology. 2009 Mar; 250(3):674-81.
  44. Taylor GA, Callahan MJ, Rodriguez D, Smink DS. CT for suspected appendicitis in children: an analysis of diagnostic errors. Pediatr Radiol. 2006 Apr; 36(4):331-7.
  45. Bixby SD, Callahan MJ, Taylor GA. Imaging in pediatric blunt abdominal trauma. Semin Roentgenol. 2008 Jan; 43(1):72-82.
  46. Rodriguez DP, Vargas S, Callahan MJ, Zurakowski D, Taylor GA. Appendicitis in young children: imaging experience and clinical outcomes. AJR Am J Roentgenol. 2006 Apr; 186(4):1158-64.
  47. Sung T, Callahan MJ, Taylor GA. Clinical and imaging mimickers of acute appendicitis in the pediatric population. AJR Am J Roentgenol. 2006 Jan; 186(1):67-74.
  48. Callahan MJ. Musculoskeletal ultrasonography of the lower extremities in infants and children. Pediatr Radiol. 2013 Mar; 43 Suppl 1:S8-22.
  49. Krishnamurthy R, Yoo JH, Thapa M, Callahan MJ. Water-bath method for sonographic evaluation of superficial structures of the extremities in children. Pediatr Radiol. 2013 Mar; 43 Suppl 1:S41-7.
  50. Bittman ME, Callahan MJ. The effective use of acai juice, blueberry juice and pineapple juice as negative contrast agents for magnetic resonance cholangiopancreatography in children. Pediatr Radiol. 2014 Jul; 44(7):883-7.
  51. Callahan MJ, Kleinman PL, Strauss KJ, Bandos A, Taylor GA, Tsai A, Kleinman PK. Pediatric CT dose reduction for suspected appendicitis: a practice quality improvement project using artificial Gaussian noise--part 1, computer simulations. AJR Am J Roentgenol. 2015 Jan; 204(1):W86-94.
  52. Bachur RG, Callahan MJ, Monuteaux MC, Rangel SJ. Integration of ultrasound findings and a clinical score in the diagnostic evaluation of pediatric appendicitis. J Pediatr. 2015 May; 166(5):1134-9.
  53. Anandalwar SP, Callahan MJ, Bachur RG, Feng C, Sidhwa F, Karki M, Taylor GA, Rangel SJ. Use of White Blood Cell Count and Polymorphonuclear Leukocyte Differential to Improve the Predictive Value of Ultrasound for Suspected Appendicitis in Children. J Am Coll Surg. 2015 Jun; 220(6):1010-7.
  54. Callahan MJ, Anandalwar SP, MacDougall RD, Stamoulis C, Kleinman PL, Rangel SJ, Bachur RG, Taylor GA. Pediatric CT dose reduction for suspected appendicitis: a practice quality improvement project using artificial gaussian noise--part 2, clinical outcomes. AJR Am J Roentgenol. 2015 Mar; 204(3):636-44.
  55. Bachur RG, Levy JA, Callahan MJ, Rangel SJ, Monuteaux MC. Effect of Reduction in the Use of Computed Tomography on Clinical Outcomes of Appendicitis. JAMA Pediatr. 2015 Aug; 169(8):755-60.
  56. Colleran GC, Callahan MJ, Paltiel HJ, Nelson CP, Cilento BG, Baum MA, Chow JS. Imaging in the diagnosis of pediatric urolithiasis. Pediatr Radiol. 2016 Nov 4.
To schedule an appointment: Call 617-355-6286

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- Sandra L. Fenwick, President and CEO

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