Takahiro Shirakawa

Evaluation of Visibility With an Eye‐tracking System: Effectiveness of Narrow‐Band Imaging for Detecting Colorectal Adenoma and Serrated Lesions

Moegi Mochizuki, Akiko Ohno, Shiori Tsubata, Ryutaro Sumi et autres

ABSTRACT Objectives Image‐enhanced endoscopy may reduce colorectal cancer mortality by improving lesion detection. Narrow‐band imaging and texture and color enhancement imaging are widely used, but their diagnostic efficacy compared with white light imaging remains unclear. This study evaluated narrow‐band imaging and texture …

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A case of pseudoxanthoma elasticum treated with endoscopic clip hemostasis for upper gastrointestinal bleeding from a Dieulafoy lesion

Ryosuke Kaji, Akiko Ohno, Jun Miyoshi, Ryutaro Sumi et autres

A 30-year-old woman with upper gastrointestinal bleeding from a Dieulafoy lesion was treated using endoscopic hemostasis. A subsequent interview revealed that she had pseudoxanthoma elasticum (PXE) with an ABCC6 gene mutation, but she had not been under medical care for many years. …

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Gastric Dieulafoy Lesion Bleeding Associated with Hemodynamic Alterations in Median Arcuate Ligament Syndrome: A Case Report

Mitsunori Kusuhara, Akiko Ohno, Jun Miyoshi, Shiori Tsubata et autres

Median arcuate ligament syndrome (MALS) involves compression of the celiac artery and it can cause a hemodynamic disturbance. We report a case of acute upper gastrointestinal bleeding from a Dieulafoy lesion arising from the collateral arterial circulation, considered secondary to MALS. Although …

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A case of tubulovillous adenoma with neuroendocrine cell nest resection

Takehisa Kijima, Mitsunori Kusuhara, Ryutaro Sumi, Shiori Tsubata et autres

An 80-year-old man underwent a colonoscopy after PET-CT for pulmonary squamous cell carcinoma (cT3N0M0, stage IIB) showed rectal uptake, revealing a 20-mm 0-IIa lesion (Rb). However, the lung cancer treatment was prioritized. Eight months later, another colonoscopy showed lesion progression to 25 …

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MG-Gen: Single Image to Motion Graphics Generation

Takahiro Shirakawa, Tomoyuki Suzuki, Takuto Narumoto, Daichi Haraguchi

We introduce MG-Gen, a framework that generates motion graphics directly from a single raster image. MG-Gen decompose a single raster image into layered structures represented as HTML, generate animation scripts for each layer, and then render them into a video. Experiments confirm …

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Image-enhanced endoscopy improves visibility of endoscopic images in individuals with color vision deficiency

Akiko Ohno, Jun Miyoshi, Mitsunori Kusuhara, Yoko Jinbo et autres

Abstract Color vision deficiency (CVD) may affect perception of color information in gastrointestinal endoscopy. However, the color-universal concept in endoscopy remains underappreciated. We hypothesized that image-enhanced endoscopy (IEE) could improve object/lesion visibility regardless of CVD and tested this hypothesis with volunteers of …

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TKG-DM: Training-free Chroma Key Content Generation Diffusion Model

Ryugo Morita, Stanislav Frolov, Brian B. Moser, Takahiro Shirakawa et autres

Diffusion models have enabled the generation of high-quality images with a strong focus on realism and textual fidelity. Yet, large-scale text-to-image models, such as Stable Diffusion, struggle to generate images where foreground objects are placed over a chroma key background, limiting their …

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IMAGE ENHANCEMENT ENDOSCOPY CONTRIBUTES TO BARRIER-FREE ENDOSCOPY CONSIDERING COLOR VISION DIVERSITY

Akiko Ohno, Shiori Tsubata, Ryutaro Sumi, Takahiro Shirakawa et autres

TKG-DM: Training-free Chroma Key Content Generation Diffusion Model

Ryugo Morita, Stanislav Frolov, Brian B. Moser, Takahiro Shirakawa et autres

Diffusion models have enabled the generation of high-quality images with a strong focus on realism and textual fidelity. Yet, large-scale text-to-image models, such as Stable Diffusion, struggle to generate images where foreground objects are placed over a chroma key background, limiting their …

The influence of color vision deficiency on vessel visibility during colorectal endoscopic submucosal dissection and the potential advantage of red dichromatic imaging to achieve color vision barrier‐free

Akiko Ohno, Naohiko Miyamoto, Ryosuke Kaji, Takahiro Shirakawa et autres

Abstract Objectives Although color information is important in gastrointestinal endoscopy, there are limited studies on how endoscopic images are viewed by people with color vision deficiency. We aimed to investigate the differences in the visibility of blood vessels during endoscopic submucosal dissection …

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NoiseCollage: A Layout-Aware Text-to-Image Diffusion Model Based on Noise Cropping and Merging

Takahiro Shirakawa, Seiichi Uchida

Layout-aware text-to-image generation is a task to generate multi-object images that reflect layout conditions in addition to text conditions. The current layout-aware text-to-image diffusion models still have several issues, including mismatches between the text and layout conditions and quality degradation of generated …

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DOES THE USE OF RDI IMPROVE BLOOD VESSEL VISIBILITY DURING ENDOSCOPIC SUBMUCOSAL DISSECTION IN ENDOSCOPISTS WITH CONGENITAL COLOR VISION DEFICIENCY? -DEVELOPMENT OF COLOR VISION ACCESSIBILITY IN ENDOSCOPY-

Akiko Ohno, Naohiko Miyamoto, Tomoya Hiratsuka, Ryosuke Kaji et autres