Andrew Callen, MD

Professional Titles

• Associate Professor, Radiology
• Director, CSF Leak Program

Publications

• Callen AL, Chow DS, Chen YA, Richelle HR, Pao J, Bardis M, Weinberg BD, Hess CP, Sugrue LP. Predictive Value of Noncontrast Head CT with Negative Findings in the Emergency Department Setting. AJNR Am J Neuroradiol. 2020 Feb;41(2):213-218. PubMed PMID: 31974080
• Callen AL, Lobach I, Mesina O, Marcus S, Joe BN, Sickles EA, Greenwood HI. The Gambler's Fallacy in Screening Mammography. J Am Coll Radiol. 2019 Jun;16(6):830-833. PubMed PMID: 30611683
• Phelps A, Callen AL, Marcovici P, Naeger DM, Mongan J, Webb EM. Can Radiologists Learn From Airport Baggage Screening?: A Survey About Using Fictional Patients for Quality Assurance. Acad Radiol. 2018 Feb;25(2):226-234. PubMed PMID: 29122472
• Callen AL, Illangasekare T, Poder L. Massive ovarian edema, due to adjacent appendicitis. Emerg Radiol. 2017 Apr;24(2):215-218. PubMed PMID: 27586353
• Callen AL, Dupont SM, Price A, Laguna B, McCoy D, Do B, Talbott J, Kohli M, Narvid J. Between Always and Never: Evaluating Uncertainty in Radiology Reports Using Natural Language Processing. J Digit Imaging. 2020 Oct;33(5):1194-1201. PubMed PMID: 32813098
• Callen AL, Caton MT, Rutledge C, Raper D, Narvid J, Villanueva-Meyer JE, Abla A. The Effect of Extracranial-to-Intracranial Bypass on Cerebral Vasoreactivity: A 4D Flow MRI Pilot Study. J Neuroimaging. 2020 Sep;30(5):587-592. PubMed PMID: 32862480
• Narvid J, McCoy D, Dupont SM, Callen A, Tosun D, Hellmuth J, Valcour V. Abnormal Cerebral Perfusion Profile in Older Adults with HIV-Associated Neurocognitive Disorder: Discriminative Power of Arterial Spin-Labeling. AJNR Am J Neuroradiol. 2018 Dec;39(12):2211-2217. PubMed PMID: 30467218
• Raper D, Rutledge W, Winkler E, Meisel K, Callen AL, Cooke D, Abla A. Controversies and Advances in Adult Intracranial Bypass Surgery in 2020. Operative Neurosurgery (2020).
• Coppolino M, Avins AL, Callen A, Sumner W. Quantifying Worry in the Face of Uncertainty: Radiation Exposure from Medical Imaging. J Med Imaging Radiat Sci. 2017 Mar;48(1):16-21. PubMed PMID: 31047204
• Feld Z, Rowen T, Callen A, Goldstein R, Poder L. Uterine artery pseudoaneurysm in the setting of deep endometriosis: an uncommon cause of hemoperitoneum in pregnancy. Emerg Radiol. 2018 Feb;25(1):107-110. PubMed PMID: 28986709
• Callen AL, Badiee RK, Phelps A, Potigailo V, Wang E, Lee S, Talbott J, Glastonbury C, Pomerantz JH, Narvid J. Facial Feminization Surgery: Key CT Findings for Preoperative Planning and Postoperative Evaluation. AJR Am J Roentgenol. 2020 Dec 30. [Epub ahead of print] PubMed PMID: 33377802
• Narvid J, Callen A, Talbott J, Uzelac A, Dupont SM, Chow F, Price RW, Rehani B. Brain MRI Features of CSF Human Immunodeficiency Virus Escape. J Neuroimaging. 2018 Nov;28(6):601-607. PubMed PMID: 30079471
• Callen A, Narvid J, Chen X, Gregath T, Meisel K. Neurovascular disease, diagnosis, and therapy: Cervical and intracranial atherosclerosis, vasculitis, and vasculopathy. Handb Clin Neurol. 2021;176:249-266. PubMed PMID: 33272399
• Caton MT, Callen AL, Copelan AZ, Narsinh KH, Smith ER, Amans MR. Jugular Venous Reflux Can Mimic Posterior Fossa Dural Arteriovenous Fistulae on MRI/MRA. AJR Am J Roentgenol. 2020 Sep 2. [Epub ahead of print] PubMed PMID: 32876481
• Callen AL, Stengel JW, Filly RA. Supratentorial abnormalities in the Chiari II malformation, II: tectal morphologic changes. J Ultrasound Med. 2009 Jan;28(1):29-35. PubMed PMID: 19106353
• Wong SK, Barkovich AJ, Callen AL, Filly RA. Supratentorial abnormalities in the Chiari II malformation, III: The interhemispheric cyst. J Ultrasound Med. 2009 Aug;28(8):999-1006. PubMed PMID: 19643781
• Yuh EL, Gean AD, Manley GT, Callen AL, Wintermark M. Computer-aided assessment of head computed tomography (CT) studies in patients with suspected traumatic brain injury. J Neurotrauma. 2008 Oct;25(10):1163-72. PubMed PMID: 18986221
• Raper DMS, Rutledge WC, Winkler EA, Meisel K, Callen AL, Cooke DL, Abla AA. Controversies and Advances in Adult Intracranial Bypass Surgery in 2020. Oper Neurosurg (Hagerstown). 2020 Dec 15;20(1):1-7. PubMed PMID: 32895706
• Callen AL, Filly RA. Supratentorial abnormalities in the Chiari II malformation, I: the ventricular "point". J Ultrasound Med. 2008 Jan;27(1):33-8. PubMed PMID: 18096728
• Callen PW, Callen AL, Glenn OA, Toi A. Columns of the fornix, not to be mistaken for the cavum septi pellucidi on prenatal sonography. J Ultrasound Med. 2008 Jan;27(1):25-31. PubMed PMID: 18096727
• Callen AL, Caton MT, Rutledge C, Raper D, Narvid J, Villanueva-Meyer JE, Abla A. The Effect of Extracranial-to-Intracranial Bypass on Cerebral Vasoreactivity: A 4D Flow MRI Pilot Study. J Neuroimaging. 2020 Sep;30(5):587-592. PubMed PMID: 32862480
• Callen AL, Dupont SM, Pyne J, Talbott J, Tien P, Calabrese E, Saloner D, Chow FC, Narvid J. The regional pattern of abnormal cerebrovascular reactivity in HIV-infected, virally suppressed women. J Neurovirol. 2020 Jun 4. [Epub ahead of print] PubMed PMID: 32500476
• Callen AL, Dupont SM, Price A, Laguna B, McCoy D, Do B, Talbott J, Kohli M, Narvid J. Between Always and Never: Evaluating Uncertainty in Radiology Reports Using Natural Language Processing. J Digit Imaging. 2020 Oct;33(5):1194-1201. PubMed PMID: 32813098
• Callen AL, Dupont SM, Pyne J, Talbott J, Tien P, Calabrese E, Saloner D, Chow FC, Narvid J. The regional pattern of abnormal cerebrovascular reactivity in HIV-infected, virally suppressed women. J Neurovirol. 2020 Oct;26(5):734-742. PubMed PMID: 32500476
• Callen AL, Chow DS, Chen YA, Richelle HR, Pao J, Bardis M, Weinberg BD, Hess CP, Sugrue LP. Predictive Value of Noncontrast Head CT with Negative Findings in the Emergency Department Setting. AJNR Am J Neuroradiol. 2020 Feb;41(2):213-218. PubMed PMID: 31974080
• Chow FC, Callen A, Arechiga V, Saloner D, Narvid J, Hsue PY. Intracranial vascular imaging detects arterial wall abnormalities in persons with treated HIV infection. AIDS. 2022 Jan 1;36(1):69-73. PubMed PMID: 34482351
• Nelson KA, Thaker AA, Callen AL, Albach E, Timpone VM. New-onset seizures in adults: Low diagnostic yield of gadolinium contrast in initial brain MRI evaluation. J Neuroimaging. 2021 Sep;31(5):874-878. PubMed PMID: 34110667
• Raban D, Barhaghi K, Timpone V, Jones W, Sauer B, Pollard R, Callen A. COVID-19 associated intracranial vasculopathy-MRI vessel wall imaging as adjunct to emergent CT angiography-a case report. Emerg Radiol. 2021 Oct;28(5):887-890. PubMed PMID: 34037875
• Callen AL, Badiee RK, Phelps A, Potigailo V, Wang E, Lee S, Talbott J, Glastonbury C, Pomerantz JH, Narvid J. Facial Feminization Surgery: Key CT Findings for Preoperative Planning and Postoperative Evaluation. AJR Am J Roentgenol. 2021 Sep;217(3):709-717. PubMed PMID: 33377802
• Callen A, Narvid J, Chen X, Gregath T, Meisel K. Neurovascular disease, diagnosis, and therapy: Cervical and intracranial atherosclerosis, vasculitis, and vasculopathy. Handb Clin Neurol. 2021;176:249-266. PubMed PMID: 33272399
• Caton MT, Callen AL, Copelan AZ, Narsinh KH, Smith ER, Amans MR. Jugular Venous Reflux Can Mimic Posterior Fossa Dural Arteriovenous Fistulas on MRI-MRA. AJR Am J Roentgenol. 2021 Jun;216(6):1626-1633. PubMed PMID: 32876481
• Callen AL, Timpone VM, Schwertner A, Zander D, Grassia F, Lennarson P, Seinfeld J, Lillehei KO, Birlea M, Thaker AA. Algorithmic Multimodality Approach to Diagnosis and Treatment of Spinal CSF Leak and Venous Fistula in Patients With Spontaneous Intracranial Hypotension. AJR Am J Roentgenol. 2022 Aug;219(2):292-301. PubMed PMID: 35261281
• Callen AL, Tanabe J, Thaker AA, Pollard R, Sauer B, Jones W, Pattee J, Steach B, Timpone V. Evaluation of Cerebrovascular Reactivity and Vessel-Wall Imaging in Patients With Prior COVID-19: A Prospective Case-Control MRI Study. AJR Am J Roentgenol. 2022 Aug 24. [Epub ahead of print] PubMed PMID: 36000667
• Callen AL, Tanabe J, Thaker AA, Pollard R, Sauer B, Jones W, Pattee J, Steach B, Timpone VM. Evaluation of Cerebrovascular Reactivity and Vessel Wall Imaging in Patients With Prior COVID-19: A Prospective Case-Control MRI Study. AJR Am J Roentgenol. 2022 Nov 9;:1-8. [Epub ahead of print] PubMed PMID: 36000667
• Bhaumik D, Bhaumik SS, Thaker AA, Timpone VM, Bills CB, Patten L, Pattee J, Chow D, Sugrue LP, Callen AL. Ordering Characteristics Predictive of Noncontrast CT Head Positivity in the Emergency Department. Acad Radiol. 2022 May 30. [Epub ahead of print] PubMed PMID: 35654657
• Callen AL, Timpone VM, Schwertner A, Zander D, Grassia F, Lennarson P, Seinfeld J, Lillehei KO, Birlea M, Thaker AA. Algorithmic Multimodality Approach to Diagnosis and Treatment of Spinal CSF Leak and Venous Fistula in Patients With Spontaneous Intracranial Hypotension. AJR Am J Roentgenol. 2022 Aug;219(2):292-301. PubMed PMID: 35261281
• Callen AL. Invited Commentary: Advancing the Field of Transgender Radiology. Radiographics. 2022 Jan-Feb;42(1):E23-E24. PubMed PMID: 34990333
• Callen AL, Fakhri M, Timpone VM, Thaker AA, Dillon WP, Shah VN. Temporal Characteristics of CSF Venous Fistulas on Dynamic Decubitus CT Myelography: A Retrospective Multi-Institution Cohort Study. AJNR Am J Neuroradiol. 2023 Dec 7;45(1):100-4. [Epub ahead of print] PubMed PMID: 38123910
• Callen AL, Wojcik R, Bojanowski M. A Novel Patient-Positioning Device for Dynamic CT Myelography. AJNR Am J Neuroradiol. 2023 Nov;44(11):1352-1355. PubMed PMID: 37827715
• Callen AL, Jones LC, Timpone VM, Pattee J, Scoffings DJ, Butteriss D, Huynh T, Shen PY, Mamlouk MD. Factors Predictive of Treatment Success in CT-Guided Fibrin Occlusion of CSF-Venous Fistulas: A Multicenter Retrospective Cross-Sectional Study. AJNR Am J Neuroradiol. 2023 Nov;44(11):1332-1338. PubMed PMID: 37798111
• Callen AL, Pattee J. Reply to "Statistics, Cerebrovascular Reactivity, and Prior COVID-19". AJR Am J Roentgenol. 2023 Sep;221(3):399-400. PubMed PMID: 37436360
• Callen AL, Lennarson P, Carroll IR. A causative role for remote dural puncture and resultant arachnoid bleb in new daily persistent headache: A case report. Headache. 2023 Jul-Aug;63(7):981-983. PubMed PMID: 37358488
• Timpone VM, Reid M, Jensen A, Poisson SN, Callen AL, Costa B, Trivedi PS. Association of Incomplete Neurovascular Imaging After Emergency Department Encounters for Transient Ischemic Attack and Odds of Subsequent Stroke: A National Medicare Analysis. AJR Am J Roentgenol. 2023 Nov;221(5):673-686. PubMed PMID: 37255044
• Callen AL, Pattee J, Thaker AA, Timpone VM, Zander DA, Turner R, Birlea M, Wilhour D, O'Brien C, Evan J, Grassia F, Carroll IR. Relationship of Bern Score, Spinal Elastance, and Opening Pressure in Patients With Spontaneous Intracranial Hypotension. Neurology. 2023 May 30;100(22):e2237-e2246. PubMed PMID: 37015821
• George E, Callen AL, Glastonbury CM. Atypical thrombophlebitis patterns in head and neck infections. Neuroradiol J. 2023 Dec;36(6):760-765. PubMed PMID: 36912438
• Turner RA, Zander D, Thaker AA, Timpone VM, Callen AL. Structured Reporting for Findings of Spontaneous Intracranial Hypotension on Brain MRI. AJR Am J Roentgenol. 2023 Aug;221(2):282-283. PubMed PMID: 36919883
• Zander DA, Gursahaney DL, Oliver C, Callen AL, Potigailo VL. CT and MR Imaging Appearance of the Pedicled Submandibular Gland Flap: A Potential Imaging Pitfall in the Posttreatment Head and Neck. AJNR Am J Neuroradiol. 2023 Apr;44(4):481-485. PubMed PMID: 36927762
• Callen AL, Dillon WP, Shah VN. Unusual neuroimaging findings in spontaneous intracranial hypotension. Neuroradiology. 2023 May;65(5):875-882. PubMed PMID: 36879063
• Callen AL, Tanabe J, Thaker AA, Pollard R, Sauer B, Jones W, Pattee J, Steach B, Timpone VM. Evaluation of Cerebrovascular Reactivity and Vessel Wall Imaging in Patients With Prior COVID-19: A Prospective Case-Control MRI Study. AJR Am J Roentgenol. 2023 Feb;220(2):257-264. PubMed PMID: 36000667
• Bhaumik D, Bhaumik SS, Thaker AA, Timpone VM, Bills CB, Patten L, Pattee J, Chow D, Sugrue LP, Callen AL. Ordering Characteristics Predictive of Noncontrast CT Head Positivity in the Emergency Department. Acad Radiol. 2023 Mar;30(3):492-498. PubMed PMID: 35654657

Practice Locations

UCHealth University of Colorado Hospital (UCH)
12605 E. 16th Ave
Aurora, CO 80045
720-848-0000

UCHealth Neurosciences Center - Anschutz Medical Campus
1635 Aurora Ct
4th Floor
Aurora, CO 80045
720-848-2080

Hospital Affiliation

• University of Colorado Hospital

Specialty Information

Specialties

• Neuroradiology, Board Certification

Conditions & Treatments

• Spine
• Brain and Nervous System