title: Diagnosis and treatment planning of acute aortic emergencies using a handheld DICOM viewer.
abstract: Acute aortic syndromes and traumatic aortic injury are often diagnosed on CT angiography, possibly requiring emergent intervention. Advances in handheld computing have created the possibility of viewing full DICOM datasets from a remote location. We evaluated the ability to diagnose and characterize acute aortic pathologies on CT angiograms of the thorax using an iPhone-based DICOM viewer. This study was performed after Institutional Review Board approval. Fifteen CT angiograms of the thorax in suspected acute aortic syndromes were evaluated by three blinded radiologists on a handheld device using a DICOM viewer. Studies were evaluated for the ability to identify and classify aortic dissection, transection, or intramural hematoma, measure aortic dimensions, and identify mediastinal hematoma, arch variants, and pulmonary pathology. Studies were compared to blinded interpretations on a dedicated PACS workstation. The aortic pathology was correctly identified as aortic transection/pseudoaneurysm (n = 5), type A dissection (n = 2), and type A intramural hematoma (n = 1) by all reviewers, with no false-positive interpretations. This represents a sensitivity and specificity of 100 %. Mediastinal hematoma (n = 6), pneumothorax (five right, three left), and arch vessel involvement (n = 2) were identified in all cases. There was 88.5 % accuracy in identifying arch variants. Measurement of the size of the involved aortic segment was similar on handheld device and PACS workstation; however the adjacent normal aorta was 1.2 ± 1.0 mm larger on the handheld device (p = 0.03). Handheld DICOM viewers may be useful for emergent consultations and triage, and may expedite preprocedure planning to reduce the time interval between diagnostic scan and therapeutic intervention.
authors.affiliation: Department of Radiology, University of Virginia, Charlottesville, VA, USA. achoudhri@uthsc.edu
authors.forename: Asim F
authors.initials: AF
authors.lastname: Choudhri
authors.forename: Patrick T
authors.initials: PT
authors.lastname: Norton
authors.forename: Thomas M
authors.initials: TM
authors.lastname: Carr
authors.forename: James R
authors.initials: JR
authors.lastname: Stone
authors.forename: Klaus D
authors.initials: KD
authors.lastname: Hagspiel
authors.forename: Michael D
authors.initials: MD
authors.lastname: Dake
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000792:Angiography; D001018:Aortic Diseases / Q000000981:diagnostic imaging* / Q000628:therapy; D040421:Cell Phone; D034201:Computers, Handheld; D003287:Contrast Media; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007472:Iohexol; D008297:Male; D008875:Middle Aged; D010347:Patient Care Planning; D013902:Radiography, Thoracic; D011873:Radiology Information Systems; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed; D014283:Triiodobenzoic Acids
chemical_list: D003287:Contrast Media; D014283:Triiodobenzoic Acids; D007472:Iohexol; C044834:iodixanol