1. Central3D: A Computer Tool to Help Clinicians Differentiate Central and Peripheral Lung Tumors 
Dominique Mathieu, MD MSc, Vincent Cousineau Daoust, MSc, Marie-Pierre Campeau, MD, Édith Filion, MD, Laurent Bilodeau, MD, Houda Bahig, MD, David Roberge, MD, Alexis Lenglet, MD, Stéphane Bedwani, PhD 
Practical Radiation Oncology 
Volume 9, Issue 1, Pages e98-e102 (January 2019)
DOI: /j.prro
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2. Figure 1
Central tumor visualization with Central3D. A, anterior; P, posterior; L, left; R, right; I, inferior; S, superior; Dmin, minimal distance; GTV, gross tumor volume; PBT, proximal bronchial tree; PTV, planning target volume.
Practical Radiation Oncology 2019 9, e98-e102DOI: ( /j.prro )
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3. Figure 2
Patient 12 has a central T2a right upper lobe tumor, and discordant classification among clinicians is observed. Gross tumor volume (red), trachea (orange), proximal bronchial tree (green). (A) Radiation oncologist 3 used axial plane view for peripheral classification (Dmin = 2.5 cm in magenta). (B) Radiation oncologist 2 used sagittal plane view for central classification (Dmin = 1.9 cm in cyan). (C) Clinician and computer-based measures in a 3-dimensional environment. Minimal distances DRO2, DRO3, and DC3D are measured by radiation oncologists 2 and 3, and computed by Central3D, respectively. A, anterior; P, posterior; L, left; R, right; I, inferior; S, superior; Dmin, minimal distance; GTV, gross tumor volume; PTV, planning target volume; PBT. proximal bronchial tree; RO2, radiation oncologist 2; RO3, radiation oncologist 3; C3D, Central3D.
Practical Radiation Oncology 2019 9, e98-e102DOI: ( /j.prro )
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