Recently, holographic display and computer-generated holograms calculated from real existing objects have been more actively investigated to support holographic video applications. In this paper, we proposed a method of generating 360-degree color holograms of real 3D objects in an efficient manner. 360-degree 3D images are generated using the actual 3D image acquisition system consisting of a depth camera and a turntable and intermediate view generation. Then, 360-degree color holograms are calculated using a viewing-window-based computer-generated hologram. We confirmed that floating 3D objects are faithfully reconstructed around a 360-degree direction using our 360-degree tabletop color holographic display.
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http://dx.doi.org/10.1364/AO.57.000A91 | DOI Listing |
Introduction: We report a case of bilateral neonatal testicular torsion, with an extravaginal and a contralateral intravaginal testicular torsion.
Case Presentation: A 5-day-old boy with bilateral scrotal swelling and palpable induration was diagnosed with bilateral neonatal testicular torsion by color Doppler ultrasonography. The right testis was black with 360-degree extravaginal torsion of the spermatic cord, and the left testis was brown with 90-degree intravaginal torsion.
Tabletop light field displays are compelling display technologies that offer stereoscopic vision and can present annular viewpoint distributions to multiple viewers around the display device. When employing the lens array to realize the of integral imaging tabletop light field display, there is a critical trade-off between the increase of the angular resolution and the spatial resolution. Moreover, as the viewers are around the device, the central viewing range of the reconstructed 3D images are wasteful.
View Article and Find Full Text PDFInt J Environ Res Public Health
February 2023
Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA 19107, USA.
(1) Background: The aim of this study was to assess the RV (right ventricle) and LV (left ventricle) Tei index in large for gestational age (LGA) fetuses with a single 360-degree umbilical coil of the umbilical cord around the fetal neck identified by ultrasound in the third trimester of gestation. (2) Methods: The RV and LV Tei index for the cardiac function were measured in 297 singleton pregnancies, and we identified 25 LGA fetuses. There were 48% of LGA fetuses with a nuchal umbilical cord-LGA/NC-larger for gestational age fetuses with a nuchal cord.
View Article and Find Full Text PDFVolumetric display technique has a great advantage of displaying realistic three-dimensional contents with a 360-degree viewing angle. However, most volumetric displays cannot provide mixed reality because their screens inside the displays obstruct the external scene. We design a 360-degree mixed-reality volumetric display using an asymmetric diffusive holographic optical element (ADHOE).
View Article and Find Full Text PDFClin Pract Cases Emerg Med
August 2022
Mayo Clinic, Department of Emergency Medicine, Rochester, Minnesota.
Introduction: Acute testicular torsion is a surgical emergency due to acute testicular ischemia. Manual testicular detorsion is a testis-saving, bedside therapeutic when performed correctly and in a timely fashion. This procedure is most commonly performed blindly with pain relief as the endpoint for detorsion.
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