Benefit of stereoscopic volume rendering for the identification of pediatric pulmonary vein stenosis from CT angiography

Abstract

The use of three-dimensional (3D) technologies in medical practice is increasing; however, its use is largely untested. One 3D technology, stereoscopic volume-rendered 3D display, can improve depth perception. Pulmonary vein stenosis (PVS) is a rare cardiovascular pathology, often diagnosed by computed tomography (CT), where volume rendering may be useful. Depth cues may be lost when volume rendered CT is displayed on regular screens instead of 3D displays. The objective of this study was to determine whether the 3D stereoscopic display of volume-rendered CT improved perception compared to standard monoscopic display, as measured by PVS diagnosis. CT angiograms (CTAs) from 18 pediatric patients aged 3 weeks to 2 years were volume rendered and displayed with and without stereoscopic display. Patients had 0 to 4 pulmonary vein stenoses. Participants viewed the CTAs in 2 groups with half on monoscopic and half on stereoscopic display and the converse a minimum of 2 weeks later, and their diagnoses were recorded. A total of 24 study participants, comprised of experienced staff cardiologists, cardiovascular surgeons and radiologists, and their trainees viewed the CTAs and assessed the presence and location of PVS. Cases were classified as simple (2 or fewer lesions) or complex (3 or more lesions). Overall, there were fewer type 2 errors in diagnosis for stereoscopic display than standard display, an insignificant difference (p = 0.095). There was a significant decrease in type 2 errors for complex multiple lesion cases (≥3) vs simpler cases (p = 0.027) and improvement in localization of pulmonary veins (p = 0.011). Subjectively, 70% of participants stated that stereoscopy was helpful in the identification of PVS. The stereoscopic display did not result in significantly decreased errors in PVS diagnosis but was helpful for more complex cases.

The SmARTR pipeline: a modular workflow for the cinematic rendering of 3D scientific imaging data

“…Enhanced by segmentation of anatomical regions of interest and virtual volume sectioning operations, DVR algorithms facilitate a detailed appreciation of complex anatomical structures and spatial relationships within biological samples. Indeed, volume rendering is crucial not only in medical and veterinary diagnostics [96][97][98][99][100][101][102][103][104][105][106][107] , pre-operative investigations [108][109][110][111][112][113][114][115][116] , and post-operative follow-up 114,[117][118][119][120] but also in diverse qualitative and quantitative analyses widely employed in scientific disciplines such as paleontology [121][122][123][124][125] , evo-devo 29,126,127 , ecology 47,[128][129][130][131][132] , and zoology 28,30,36,48,49,…”