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Enhancing Radiographic Diagnosis: CycleGAN-Based Methods for Reducing Cast Shadow Artifacts in Wrist Radiographs.
J Imaging Inform Med
January 2025
Monash Imaging, Monash Health, 246 Clayton Rd, Clayton, VIC, 3168, Australia.
We extend existing techniques by using generative adversarial network (GAN) models to reduce the appearance of cast shadows in radiographs across various age groups. We retrospectively collected 11,500 adult and paediatric wrist radiographs, evenly divided between those with and without casts. The test subset consisted of 750 radiographs with cast and 750 without cast.
View Article and Find Full Text PDF[Metastatic Lung Tumor with Bronchial Cast Shadow in Which Intraoperative Bronchoscopy Was Useful During Robotic Surgery].
Kyobu Geka
December 2024
Department of Thoracic Surgery, Tokyo Women's Medical University, Tokyo, Japan.
A man in his 60s, who had undergone surgery for rectal cancer, liver metastases, and lung metastasis, had a past history of myocardial infarction and ventricular fibrillation with reduced cardiac functions. He was referred to our department because of a pulmonary nodule shadow in the S2 right upper lobe and a bronchial cast shadow along the B2 bronchus. Robot-assisted thoracoscopic right S2 segmentectomy was performed and intraoperative bronchoscopy revealed a polyp-like tumor within B2a.
View Article and Find Full Text PDFEvent Horizon Telescope observations exclude compact objects in baseline mimetic gravity.
Sci Rep
November 2024
Department of Physics, K. N. Toosi University of Technology, P. O. Box 15875-4416, Tehran, Iran.
Mimetic gravity has gained significant appeal in cosmological contexts, but static spherically symmetric space-times within the baseline theory are highly non-trivial: the two natural solutions are a naked singularity and a black hole space-time obtained through an appropriate gluing procedure. We study the shadow properties of these two objects, finding both to be pathological. In particular, the naked singularity does not cast a shadow, whereas the black hole casts a shadow which is too small.
View Article and Find Full Text PDFThe lack of floater perception in eyes with asteroid hyalosis and its direct implications on laser vitreolysis.
Int J Retina Vitreous
October 2024
Department of Ophthalmology, Rambam Health Care Campus, P.O.B 9602, Haifa, 31096, Israel.
Purpose: To present a novel optical model explaining why the vast majority of patients with Asteroid Hyalosis (AH) do not perceive any floaters. This changes our understanding of floater perception and undermines the operation mode of YAG laser vitreolysis.
Methods: Relying on a previously published model of floater perception based on astronomical equations of a solar eclipse, and on ultrasound images of the vitreous in three eyes with AH, we explain why such patients do not perceive floaters in spite of opaque bodies filling their entire vitreous, to the point of, in severe cases of AH, obscuring the fundus view during ophthalmoscopy.
A higher shadow ratio of the living environment on the remote sensing digital image is possibly protective for adolescent myopia.
Sci Rep
October 2024
Department of Ophthalmology, First affiliated hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.
Article Synopsis
- This study investigates the impact of residential construction patterns on adolescent myopia through a survey of 10th-grade students in a private high school in a megacity in mid-west China.
- Researchers collected data on students' myopia levels, home addresses, and used satellite imagery to analyze the amount of shadow and greenness around their homes.
- The findings suggest a negative correlation between myopia levels and the proportion of shadow area, with high-rise apartment buildings potentially acting as a protective factor against myopia progression by increasing available ground space in densely populated areas.
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