Michael J. Callahan, MD

Body Imaging Section Chief, Department of Radiology; CT Medical Director, Department of Radiology; Staff Radiologist, Department of Radiology

Associate Professor of Radiology, Harvard Medical School

Phone 617-355-6286

Fax 617-730-0573

NPI 1285662668

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Michael J. Callahan, MD

Body Imaging Section Chief, Department of Radiology; CT Medical Director, Department of Radiology; Staff Radiologist, Department of Radiology

Associate Professor of Radiology, Harvard Medical School

Medical Services

Languages

English

Education

Undergraduate School

Hobart College

1991

Geneva

Medical School

Upstate Medical University

1995

Syracuse

Internship

Malden Hospital

1996

Malden

Residency

Tufts University School of Medicine

2000

Boston

Fellowship

Pediatric Radiology

Boston Children's Hospital

2002

Boston

Certifications

American Board of Radiology (Diagnostic Radiology)

American Board of Radiology (Pediatric Radiology)

Professional History

Dr. Michael Callahan received his BS degree from Hobart College, and his MD degree from Upstate Medical University in Syracuse, New York. He completed a diagnostic radiology residency at Tufts Medical Center, and a fellowship in pediatric radiology at Boston Children's Hospital.

Dr. Callahan is 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.

His research interests include CT dose optimization, abdominal imaging and musculoskeletal ultrasound. He is a member of the Image Gently® Steering Committee, and will be the Secretary of the Society for Pediatric Radiology (SPR) from 2016-2019.

Publications

Contrast Media in Children: Ten Important Concepts on Administration, Applications, Complications, and Environmental Considerations, From the AJR Special Series on Contrast Media. View Abstract

Reconsidering pregnancy screening policies for minors: patient-specific estimate of fetus and effective dose for potentially pregnant minors undergoing optimized dose CT of the pelvis. View Abstract

Hip Imaging in Children With Cerebral Palsy: Estimation and Intrapatient Comparison of Patient-Specific Radiation Doses of Low-Dose CT and Radiography. View Abstract

Is Thyroid Monitoring Warranted in Infants and Young Children After Intravascular Administration of Iodine-Based Contrast Media? View Abstract

Diagnostic challenges with central venous catheter studies. View Abstract

Triple gallbladder with heterotopic gastric mucosa: a case report. View Abstract

Beyond the AJR: Enduring Gaps in Patient Understanding of Imaging-Associated Ionizing Radiation. View Abstract

Radiographic assessment of traction-induced esophageal growth and traction-related complications of the Foker process for treatment of long-gap esophageal atresia. View Abstract

The impact of social distancing during the COVID-19 pandemic on rates of pediatric idiopathic intussusception. View Abstract

The pediatric stomach - congenital abnormalities. View Abstract

Assessing and conveying risks and benefits of imaging in neonates using ionizing radiation and sedation/anesthesia. View Abstract

Acute pancreatitis in children: a review with clinical perspectives to enhance imaging interpretation. View Abstract

Guidelines for expert testimony in pediatric radiology. View Abstract

Free-breathing radial stack-of-stars three-dimensional Dixon gradient echo sequence in abdominal magnetic resonance imaging in sedated pediatric patients. View Abstract

Current State of Imaging of Pediatric Pancreatitis: AJR Expert Panel Narrative Review. View Abstract

Should I irradiate with computed tomography or sedate for magnetic resonance imaging? View Abstract

Leveraging the Combined Predictive Value of Ultrasound and Laboratory Data to Reduce Radiation Exposure and Resource Utilization in Children with Suspected Appendicitis. View Abstract

Imaging features of pathologically proven pediatric splenic masses. View Abstract

Stresses and anxieties in the time of the COVID-19 pandemic - what we can learn. View Abstract

The pediatric stomach - masses and mass-like pathology. View Abstract

Wellness in pediatric radiology: lessons learned in a time of pandemic. View Abstract

Air contrast enema reduction of single and recurrent ileocolic intussusceptions in children: patterns, management and outcomes. View Abstract

Improving Low-Dose Pediatric Abdominal CT by Using Convolutional Neural Networks. View Abstract

Nathan Thorne Griscom, MD (1931-2019). View Abstract

Intravenous gadolinium-based hepatocyte-specific contrast agents (HSCAs) for contrast-enhanced liver magnetic resonance imaging in pediatric patients: what the radiologist should know. View Abstract

Pediatric radiologists and burnout: identifying stressors and moving forward. View Abstract

Practical administration of intravenous contrast media in children: screening, prophylaxis, administration and treatment of adverse reactions. View Abstract

Curved planar reformatting and convolutional neural network-based segmentation of the small bowel for visualization and quantitative assessment of pediatric Crohn's disease from MRI. View Abstract

Correction to: Ionizing radiation from computed tomography versus anesthesia for magnetic resonance imaging in infants and children: patient safety considerations. View Abstract

Ionizing radiation from computed tomography versus anesthesia for magnetic resonance imaging in infants and children: patient safety considerations. View Abstract

How we read pediatric PET/CT: indications and strategies for image acquisition, interpretation and reporting. View Abstract

The radiological home: Pediatric anesthesiologist's role in risk assessment for imaging procedures. View Abstract

Operational and Dosimetric Aspects of Pediatric PET/CT. View Abstract

Development of a Standardized Kalamazoo Communication Skills Assessment Tool for Radiologists: Validation, Multisource Reliability, and Lessons Learned. View Abstract

Motion-robust parameter estimation in abdominal diffusion-weighted MRI by simultaneous image registration and model estimation. View Abstract

Advances in the Decision to Image or Not to Image. View Abstract

Initial response of the European Society of Paediatric Radiology and Society for Pediatric Radiology to the Swedish Agency for Health Technology Assessment and Assessment of Social Services' document on the triad of shaken baby syndrome. View Abstract

Pediatric Chest CT Diagnostic Reference Ranges: Development and Application. View Abstract

Practical use and pitfalls of hepatocyte-specific contrast agents (HSCAs) for pediatric hepatic and biliary magnetic resonance imaging. View Abstract

Quality of pediatric abdominal CT scans performed at a dedicated children's hospital and its referring institutions: a multifactorial evaluation. View Abstract

Imaging in the diagnosis of pediatric urolithiasis. View Abstract

Selecting appropriate gastroenteric contrast media for diagnostic fluoroscopic imaging in infants and children: a practical approach. View Abstract

Spatially-constrained probability distribution model of incoherent motion (SPIM) for abdominal diffusion-weighted MRI. View Abstract

The Use of Enteric Contrast Media for Diagnostic CT, MRI, and Ultrasound in Infants and Children: A Practical Approach. View Abstract

Size-based protocol optimization using automatic tube current modulation and automatic kV selection in computed tomography. View Abstract

Imaging findings of Hoffa's fat pad herniation. View Abstract

Effect of Reduction in the Use of Computed Tomography on Clinical Outcomes of Appendicitis. View Abstract

Spatially constrained incoherent motion method improves diffusion-weighted MRI signal decay analysis in the liver and spleen. View Abstract

Pediatric CT dose reduction for suspected appendicitis: a practice quality improvement project using artificial gaussian noise--part 2, clinical outcomes. View Abstract

Enthesitis as a component of dactylitis in psoriatic juvenile idiopathic arthritis: histology of an established clinical entity. View Abstract

Integration of ultrasound findings and a clinical score in the diagnostic evaluation of pediatric appendicitis. View Abstract

Use of White Blood Cell Count and Polymorphonuclear Leukocyte Differential to Improve the Predictive Value of Ultrasound for Suspected Appendicitis in Children. View Abstract

Pediatric CT dose reduction for suspected appendicitis: a practice quality improvement project using artificial Gaussian noise--part 1, computer simulations. View Abstract

Motion Compensated Abdominal Diffusion Weighted MRI by Simultaneous Image Registration and Model Estimation (SIR-ME). View Abstract

Practice patterns for the use of iodinated i.v. contrast media for pediatric CT studies: a survey of the Society for Pediatric Radiology. View Abstract

Radiology trainees' comfort with difficult conversations and attitudes about error disclosure: effect of a communication skills workshop. View Abstract

The effective use of acai juice, blueberry juice and pineapple juice as negative contrast agents for magnetic resonance cholangiopancreatography in children. View Abstract

Diagnostic reference ranges for pediatric abdominal CT. View Abstract

Pediatric musculoskeletal imaging: beyond the basics. View Abstract

Musculoskeletal ultrasonography of the lower extremities in infants and children. View Abstract

Ultrasound evaluation of superficial lumps and bumps of the extremities in children: a 5-year retrospective review. View Abstract

Water-bath method for sonographic evaluation of superficial structures of the extremities in children. View Abstract

US diagnosis of pediatric muscle hernias of the lower extremities. View Abstract

Reliable estimation of incoherent motion parametric maps from diffusion-weighted MRI using fusion bootstrap moves. View Abstract

Image Gently 5 years later: what goals remain to be accomplished in radiation protection for children? View Abstract

Characterization of fast and slow diffusion from diffusion-weighted MRI of pediatric Crohn's disease. View Abstract

In vivo assessment of optimal b-value range for perfusion-insensitive apparent diffusion coefficient imaging. View Abstract

Diagnostic imaging and negative appendectomy rates in children: effects of age and gender. View Abstract

Reply to commentary--'CT radiation dose reduction: can we do harm by doing good?'. View Abstract

Reliable assessment of perfusivity and diffusivity from diffusion imaging of the body. View Abstract

Advanced radiologic imaging for pediatric appendicitis, 2005-2009: trends and outcomes. View Abstract

Image Gently: progress and challenges in CT education and advocacy. View Abstract

ALARA (as low as reasonably achievable) CT 2011--executive summary. View Abstract

CT dose reduction in practice. View Abstract

Approaches to promotion and implementation of action on Radiation Protection for children. View Abstract

Has pediatric CT at children's hospitals reached its peak? View Abstract

Image gently: Ten steps you can take to optimize image quality and lower CT dose for pediatric patients. View Abstract

Nonionic iodinated intravenous contrast material-related reactions: incidence in large urban children's hospital--retrospective analysis of data in 12,494 patients. View Abstract

The Image Gently campaign: working together to change practice. View Abstract

The 'Image Gently' campaign: increasing CT radiation dose awareness through a national education and awareness program. View Abstract

Imaging in pediatric blunt abdominal trauma. View Abstract

Congenital and developmental pancreatic anomalies: ultrasound, computed tomography, and magnetic resonance imaging features. View Abstract

Ingestion of magnetic foreign bodies causing multiple bowel perforations. View Abstract

3D multidetector CT angiographic evaluation of extralobar pulmonary sequestration with anomalous venous drainage into the left internal mammary vein in a paediatric patient. View Abstract

Appendicitis in young children: imaging experience and clinical outcomes. View Abstract

CT for suspected appendicitis in children: an analysis of diagnostic errors. View Abstract

Clinical and imaging mimickers of acute appendicitis in the pediatric population. View Abstract

Desmoplastic small round cell tumor of the kidney in a pediatric patient: sonographic and multiphase CT findings. View Abstract

Disorders of the pediatric pancreas: imaging features. View Abstract

CT of the pediatric esophagus. View Abstract

CT of appendicitis in children. View Abstract

The drooping lily sign. View Abstract

The development of hypertrophic pyloric stenosis in a patient with prostaglandin-induced foveolar hyperplasia. View Abstract

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