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Ota T, Onishi H, Itoh T, Fukui H, Tsuboyama T, Nakamoto A, Enchi Y, Tatsumi M, Tomiyama N. Investigation of abdominal artery delineation by photon-counting detector CT. LA RADIOLOGIA MEDICA 2024; 129:1265-1274. [PMID: 39043979 PMCID: PMC11379784 DOI: 10.1007/s11547-024-01858-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Accepted: 07/17/2024] [Indexed: 07/25/2024]
Abstract
OBJECTIVES To evaluate the ability of 50-keV virtual monoenergetic images (VMI) to depict abdominal arteries in abdominal CT angiography (CTA) compared with 70-keV VMI with photon-counting detector CT (PCD-CT). METHODS Fifty consecutive patients who underwent multiphase abdominal scans between March and April 2023 were included. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were quantitatively assessed for the abdominal aorta (AA), celiac artery (CeA), superior mesenteric artery (SMA), renal artery (RA), and right hepatic artery (RHA) at both 50- and 70-keV VMI. In addition, 3D images from CTA were analyzed to measure arterial lengths and evaluate the visualization of distal branches. RESULTS Significantly higher SNR and CNR were observed at 50-keV compared to 70-keV VMI for all arteries: AA (36.54 and 48.28 vs. 25.70 and 28.46), CeA (22.39 and 48.38 vs. 19.09 and 29.15), SMA (23.34 and 49.34 vs. 19.67 and 29.71), RA (22.88 and 48.84 vs. 20.15 and 29.41), and RHA (14.38 and 44.41 vs. 13.45 and 27.18), all p < 0.05. Arterial lengths were also significantly longer at 50-keV: RHA (192.6 vs. 180.3 mm), SMA (230.9 vs. 216.5 mm), and RA (95.9 vs. 92.0 mm), all p < 0.001. CONCLUSION In abdominal CTA with PCD-CT, 50-keV VMI demonstrated superior quantitative image quality compared to 70-keV VMI. In addition, 50-keV VMI 3D CTA allowed better visualization of abdominal artery branches, highlighting its potential clinical advantage for improved imaging and detailed assessment of abdominal arteries.
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Affiliation(s)
- Takashi Ota
- Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, D1, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan.
| | - Hiromitsu Onishi
- Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, D1, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Toshihide Itoh
- Department of CT Research and Collaboration, Siemens Healthineers, Tokyo, Japan
| | - Hideyuki Fukui
- Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, D1, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Takahiro Tsuboyama
- Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, D1, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Atsushi Nakamoto
- Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, D1, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yukihiro Enchi
- Department of Medical Technology, Osaka University Hospital, Suita, Japan
| | - Mitsuaki Tatsumi
- Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, D1, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Noriyuki Tomiyama
- Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, D1, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
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Ucar FA, Frenzel M, Kronfeld A, Altmann S, Sanner AP, Mercado MAA, Uphaus T, Brockmann MA, Othman AE. Improvement of Neurovascular Imaging Using Ultra-High-Resolution Computed Tomography Angiography. Clin Neuroradiol 2024; 34:189-199. [PMID: 37831106 PMCID: PMC10881789 DOI: 10.1007/s00062-023-01348-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 08/23/2023] [Indexed: 10/14/2023]
Abstract
OBJECTIVE To evaluate diagnostic image quality of ultra-high-resolution computed tomography angiography (UHR-CTA) in neurovascular imaging as compared to normal resolution CT-angiography (NR-CTA). MATERIAL AND METHODS In this retrospective single-center study brain and neck CT-angiography was performed using an ultra-high-resolution computed tomography scanner (n = 82) or a normal resolution CT scanner (NR-CTA; n = 73). Ultra-high-resolution images were reconstructed with a 1024 × 1024 matrix and a slice thickness of 0.25 mm, whereas NR-CT images were reconstructed with a 512 × 512 matrix and a slice thickness of 0.5 mm. Three blinded neuroradiologists assessed overall image quality, artifacts, image noise, overall contrast and diagnostic confidence using a 4-point Likert scale. Furthermore, the visualization and delineation of supra-aortic arteries with an emphasis on the visualization of small intracerebral vessels was assessed using a cerebral vascular score, also utilizing a 4-point Likert scale. Quantitative analyses included signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), noise and the steepness of gray value transition. Radiation exposure was determined by comparison of computed tomography dose index (CTDIvol), dose length product (DLP) and mean effective dose. Interrater agreement was evaluated via determining Fleiss-Kappa. RESULTS Ultra-high-resolution CT-angiography (UHR-CTA) yielded excellent image quality with superior quantitative (SNR: p < 0.001, CNR: p < 0.001, steepness of gray value transition: p < 0.001) and qualitative results (overall image quality: 4 (Inter quartile range (IQR) = 4-4); p < 0.001, diagnostic confidence: 4 (IQR = 4-4); p < 0.001) compared to NR-CT (overall image quality: 3 (IQR = 3-3), diagnostic confidence: 3 (IQR = 3-4)). Furthermore, UHR-CT enabled significantly superior delineation and visualization of all vascular segments, from proximal extracranial vessels to the smallest peripheral cerebral branches (e.g. , UHR-CTA PICA 4 (3-4) vs. NR-CTA PICA: 3 (2-3); UHR-CTA P4: 4 (IQR = 3-4) vs. NR-CTA P4: 2 (IQR = 2-3); UHR-CTA M4: 4 (IQR = 4-4) vs. NR-CTA M4: 3 (IQR = 2-3); UHR-CTA A4: 4 (IQR = 3-4) vs. NR-CTA A4: 2 (IQR = 2-3); all p < 0.001). Noteworthy, a reduced mean effective dose was observed when applying UHR-CT (NR-CTA: 1.8 ± 0.3 mSv; UHR-CTA: 1.5 ± 0.5 mSv; p < 0.001). CONCLUSION Ultra-high-resolution CT-angiography improves image quality in neurovascular imaging allowing the depiction and evaluation of small peripheral cerebral arteries. It may thus improve the detection of pathologies in small cerebrovascular lesions and the resulting diagnosis.
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Affiliation(s)
- Felix A Ucar
- Department of Neuroradiology, University Medical Center Mainz, Langenbeckstr. 1, 55131, Mainz, Germany
| | - Marius Frenzel
- Department of Neuroradiology, University Medical Center Mainz, Langenbeckstr. 1, 55131, Mainz, Germany
| | - Andrea Kronfeld
- Department of Neuroradiology, University Medical Center Mainz, Langenbeckstr. 1, 55131, Mainz, Germany
| | - Sebastian Altmann
- Department of Neuroradiology, University Medical Center Mainz, Langenbeckstr. 1, 55131, Mainz, Germany
| | - Antoine P Sanner
- Department of Neuroradiology, University Medical Center Mainz, Langenbeckstr. 1, 55131, Mainz, Germany
- Department of Computer Science, Fraunhofer IGD, Technical University Darmstadt, Fraunhoferstraße 5, 64283, Darmstadt, Germany
| | | | - Timo Uphaus
- Department of Neurology, University Medical Center Mainz, Langenbeckstr. 1, 55131, Mainz, Germany
| | - Marc A Brockmann
- Department of Neuroradiology, University Medical Center Mainz, Langenbeckstr. 1, 55131, Mainz, Germany
| | - Ahmed E Othman
- Department of Neuroradiology, University Medical Center Mainz, Langenbeckstr. 1, 55131, Mainz, Germany.
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Deng J, Ma T, Yan J, Wu S, Yan G, Li H, Li Y, Zhao L, Fan X, McClure MA, Bhetuwal A. Effect of Low Tube Voltage (100 kV) Combined with ASIR-V on the Visualization and Image Quality of the Adamkiewicz Artery: A Comparison with 120 kV Protocol. Diagnostics (Basel) 2023; 13:2495. [PMID: 37568857 PMCID: PMC10417362 DOI: 10.3390/diagnostics13152495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/22/2023] [Accepted: 07/24/2023] [Indexed: 08/13/2023] Open
Abstract
OBJECTIVE To evaluate the effect of low tube voltage (100 kV) combined with adaptive statistical iterative reconstruction-V (ASIR-V) on the visualization and image quality of the Adamkiewicz artery (AKA). METHODS One hundred patients were prospectively enrolled and randomly assigned into two groups (both n = 50). Group A (100 kV) was reconstructed with filtered back projection (FBP) and ASIR-V from 10% to 100% with 10% intervals. Group B (120 kV) was only reconstructed with FBP. The objective image quality was evaluated by using CT values of the aorta (CTAorta), background noise, signal-to-noise ratio of the descending aorta (SNRAorta), and contrast-to-noise ratio of the spinal cord (CNRSpinal cord). The subjective image quality and visualization scores of the AKA were assessed on a 5-point scale. RESULTS CTAorta was significantly higher in Group A than in Group B (p < 0.001). When ASIR-V weights were ≥60%, significant differences were found in the background noise, SNRAorta, and CNRSpinal cord between the two groups (all p < 0.05). In Group A, compared with FBP, the subjective score gradually increased as ASIR-V increased to 80%, which decreased when ASIR-V exceeded 80%. The visualization scores of the AKA (≥60%) and the ability to detect vessel continuity (≥80%) gradually increased as the ASIR-V weights increased (p < 0.05). The effective radiation dose was reduced by about 40.36% in Group A compared to Group B. CONCLUSIONS compared with conventional scanning protocol, using a combination of low tube voltage (100 kV) and 80% ASIR-V protocol could not only increase the visualization of the AKA, but also improve image quality and reduce the radiation doses.
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Affiliation(s)
- Jiantao Deng
- Department of Radiology, Suining Central Hospital, Suining 629000, China
| | - Ting Ma
- Department of Radiology, Suining Central Hospital, Suining 629000, China
| | - Jing Yan
- Department of Radiology, Suining Central Hospital, Suining 629000, China
| | - Siyi Wu
- Department of Radiology, Suining Central Hospital, Suining 629000, China
| | - Gaowu Yan
- Department of Radiology, Suining Central Hospital, Suining 629000, China
| | - Hongwei Li
- Department of Radiology, The Third Hospital of Mianyang and Sichuan Mental Health Center, Mianyang 621000, China
| | - Yong Li
- Department of Radiology, Suining Central Hospital, Suining 629000, China
| | - Linwei Zhao
- Department of Radiology, Suining Central Hospital, Suining 629000, China
| | - Xiaoping Fan
- Department of Radiology, Suining Central Hospital, Suining 629000, China
| | - Morgan A. McClure
- Department of Radiology and Imaging, Institute of Rehabilitation and Development of Brain Function, The Second Clinical Medical College of North Sichuan Medical College Nanchong Central Hospital, Nanchong 637000, China
| | - Anup Bhetuwal
- Sichuan Key Laboratory of Medical Imaging and Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
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Zarfati A, Martucci C, Persano G, Cassanelli G, Crocoli A, Madafferi S, Natali GL, De Ioris MA, Inserra A. Preoperative Spinal Angiography for Thoracic Neuroblastoma: Impact of Identification of the Adamkiewicz Artery on Gross Total Resection and Neurological Sequelae. CHILDREN (BASEL, SWITZERLAND) 2023; 10:1116. [PMID: 37508612 PMCID: PMC10378327 DOI: 10.3390/children10071116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 06/19/2023] [Accepted: 06/24/2023] [Indexed: 07/30/2023]
Abstract
BACKGROUND Patients with thoracic neuroblastoma (TNB) are at high risk of postoperative neurologic complications due to iatrogenic lesions of the artery of Adamkiewicz (AKA). The role of performing a preoperative spinal angiography (POSA) in these patients must be clarified. The present study sought to further understand the relationship between POSA and TNB, as well as the effects of identifying the AKA on surgical excision and neurological consequences. METHODS Data from patients with TNB who underwent POSA between November 2015 and February 2022 at our tertiary pediatric center were retrospectively analyzed. RESULTS Six patients were identified, five of whom (83%) were considered eligible for surgical excision. Gross total resection (GTR) was achieved in three patients (60%), which included two patients with an AKA contralateral to the tumor, and one with an homolateral AKAl. After a median follow-up of 4.1 years from diagnosis, no patients developed neurological complications; five (83%) were alive and well, and one died from refractory recurrence. CONCLUSIONS Among patients with TNB, POSA was useful for identifying the AKA and defining the optimal surgical strategy. POSA should be considered in the preoperative evaluation of TNB to increase the likelihood of GTR and reduce the threats of iatrogenic neurologic sequelae.
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Affiliation(s)
- Angelo Zarfati
- General and Thoracic Pediatric Surgery Unit, Bambino Gesù Children's Hospital, IRCCS, 00165 Rome, Italy
| | - Cristina Martucci
- General and Thoracic Pediatric Surgery Unit, Bambino Gesù Children's Hospital, IRCCS, 00165 Rome, Italy
| | - Giorgio Persano
- Surgical Oncology Unit, Bambino Gesù Children's Hospital, IRCCS, 00165 Rome, Italy
| | - Giulia Cassanelli
- Interventional Radiology Unit, Bambino Gesù Children's Hospital, IRCCS, 00165 Rome, Italy
| | - Alessandro Crocoli
- Surgical Oncology Unit, Bambino Gesù Children's Hospital, IRCCS, 00165 Rome, Italy
| | - Silvia Madafferi
- Surgical Oncology Unit, Bambino Gesù Children's Hospital, IRCCS, 00165 Rome, Italy
| | - Gian Luigi Natali
- Interventional Radiology Unit, Bambino Gesù Children's Hospital, IRCCS, 00165 Rome, Italy
| | - Maria Antonietta De Ioris
- Department of Hematology/Oncology, Cell Therapy, Gene Therapies and Hemopoietic Transplant, Bambino Gesù Children's Hospital, IRCCS, 00165 Rome, Italy
| | - Alessandro Inserra
- General and Thoracic Pediatric Surgery Unit, Bambino Gesù Children's Hospital, IRCCS, 00165 Rome, Italy
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Sakai Y, Hida T, Matsuura Y, Kamitani T, Onizuka Y, Shirasaka T, Kato T, Ishigami K. Impact of a new deep-learning-based reconstruction algorithm on image quality in ultra-high-resolution CT: clinical observational and phantom studies. Br J Radiol 2023; 96:20220731. [PMID: 36318483 PMCID: PMC10997025 DOI: 10.1259/bjr.20220731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 10/14/2022] [Accepted: 10/22/2022] [Indexed: 11/07/2022] Open
Abstract
OBJECTIVES To demonstrate the effect of an improved deep learning-based reconstruction (DLR) algorithm on Ultra-High-Resolution Computed Tomography (U-HRCT) scanners. METHODS Clinical and phantom studies were conducted. Thirty patients who underwent contrast-enhanced CT examination during the follow-up period were enrolled. Images were reconstructed using improved DLR [termed, New DLR, i.e., Advanced Intelligent Clear-IQ Engine (AiCE) Body Sharp] and conventional DLR (Conv DLR, AiCE Body) algorithms. Two radiologists assessed the overall image quality using a 5-point scale (5 = excellent; 1 = unacceptable). The noise power spectra (NPSs) were calculated to assess the frequency characteristics of the image noise, and the square root of area under the curve (√AUC NPS) between 0.05 and 0.50 cycle/mm was calculated as an indicator of the image noise. Dunnett's test was used for statistical analysis of the visual evaluation score, with statistical significance set at p < 0.05. RESULTS The overall image quality of New DLR was better than that of the Conv DLR (4.2 ± 0.4 and 3.3 ± 0.4, respectively; p < 0.0001). All New DLR images had an overall image quality score above the average or excellent. The √AUCNPS value of New DLR was lower than that of Conv DLR (13.8 and 14.2, respectively). The median values of reconstruction time required with New DLR and Conv DLR were 5.0 and 7.8 min, respectively. CONCLUSIONS The new DLR algorithm improved the image quality within a practical reconstruction time. ADVANCES IN KNOWLEDGE The new DLR enables us to choose whether to improve image quality or reduce the dose.
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Affiliation(s)
- Yuki Sakai
- Division of Radiology, Department of Medical Technology,
Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
| | - Tomoyuki Hida
- Department of Clinical Radiology, Graduate School of Medical
Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
| | - Yuko Matsuura
- Department of Clinical Radiology, Graduate School of Medical
Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
| | - Takeshi Kamitani
- Department of Clinical Radiology, Graduate School of Medical
Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
| | - Yasuhiro Onizuka
- Division of Radiology, Department of Medical Technology,
Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
| | - Takashi Shirasaka
- Division of Radiology, Department of Medical Technology,
Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
| | - Toyoyuki Kato
- Division of Radiology, Department of Medical Technology,
Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
| | - Kousei Ishigami
- Department of Clinical Radiology, Graduate School of Medical
Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku,
Fukuoka, Japan
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Hsu JL, Chin SC, Cheng MH, Wu YR, Ro A, Ro LS. Postpartum Spinal Cord Infarction: A Case Report and Review of the Literature. MEDICINES (BASEL, SWITZERLAND) 2022; 9:54. [PMID: 36355059 PMCID: PMC9698876 DOI: 10.3390/medicines9110054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 10/20/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
Abstract
Background: Postpartum spinal cord infarction is a very rare disease. Only two cases have been reported in the English literature. Methods: We reported a 26 year old female who received second doses of the mRNA-1273 vaccine 52 days before delivery. She presented as sudden onset of paraplegia, sensory level, and sphincter incontinence at postpartum period. No history of heparin exposure was noted. Imaging findings confirmed the T10-11 level infarction and her anti-human heparin platelet factor 4 (anti-PF4) antibody was positive. After 7 days of dexamethasone therapy, her paraplegia and urinary incontinence gradually improved. Results: The CT angiography (CTA) of the artery of Adamkiewicz (Aka) showed tandem narrowing, most conspicuous at the T10-11 level, which was presumably due to partial occlusion of the arteriolar lumen. The thoracolumbar spine magnetic resonance imaging with contrast medium showed owl's eyes sign at the T10 and T11 levels. We compared our case with two other case reports from the literature. Conclusions: Post-partum spinal cord infarction with positive anti-PF4 antibody and relatively thrombocytopenia are the characteristics of our case.
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Affiliation(s)
- Jung-Lung Hsu
- Department of Neurology, New Taipei Municipal TuCheng Hospital, Chang Gung Memorial Hospital and Chang Gung University, New Taipei City 236, Taiwan
- Department of Neurology, Chang Gung Memorial Hospital Linkou Medical Center and College of Medicine, Chang-Gung University, Taoyuan 333, Taiwan
- Graduate Institute of Humanities in Medicine and Research Center for Brain and Consciousness, Shuang Ho Hospital, Taipei Medical University, Taipei 110, Taiwan
| | - Shy-Chyi Chin
- Department of Medical Imaging and Intervention, Linkou Medical Center, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan
| | - Ming-Huei Cheng
- Division of Reconstructive Microsurgery, Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
- Section of Plastic Surgery, Department of Surgery, University of Michigan, Ann Arbor, MI 48105, USA
| | - Yih-Ru Wu
- Department of Neurology, Chang Gung Memorial Hospital Linkou Medical Center and College of Medicine, Chang-Gung University, Taoyuan 333, Taiwan
| | - Aileen Ro
- Department of Obstetrics and Gynecology, College of Medicine, Linkou Chang Gung Memorial Hospital and Chang-Gung University, Taoyuan 333, Taiwan
| | - Long-Sun Ro
- Department of Neurology, Chang Gung Memorial Hospital Linkou Medical Center and College of Medicine, Chang-Gung University, Taoyuan 333, Taiwan
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Ikushima Y, Tokurei S, Sato S, Ikushima K, Hashimoto N, Morishita J, Yabuuchi H. Influence of monitor display resolution and displayed image size on the spatial resolution of ultra-high-resolution CT images: a phantom study. Radiol Phys Technol 2022; 15:147-155. [PMID: 35462583 DOI: 10.1007/s12194-022-00656-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 04/08/2022] [Accepted: 04/09/2022] [Indexed: 10/18/2022]
Abstract
To determine the optimal display conditions for ultra-high-resolution computed tomography (UHRCT) images in clinical practice, this study investigated the effects of liquid-crystal display (LCD) resolution and displayed image size on the spatial resolution of phantom images acquired using a UHRCT system. A phantom designed to evaluate the high-contrast resolution was scanned. The scan data were reconstructed into four types of UHRCT image series consisting of the following possible combinations: two types of reconstruction kernels on the filtered back-projection method (for the lung and mediastinum) and two types of matrix sizes (10242 and 20482). These images were displayed under eight types of display conditions: three image sizes displayed on a 2-megapixel (MP) and 3-MP color LCD and two image sizes on an 8-MP color LCD. A total of 32 samples (four image series × eight display conditions) were evaluated by eight observers for high-contrast resolution. The high-contrast resolution of the displayed UHRCT images was significantly affected by the displayed image size, although the largest (full-screen) displayed image size did not necessarily show the maximum high-contrast resolution. When the images were displayed in the full-screen size, LCD resolution affected the high-contrast resolution of only the 20482-matrix-size images reconstructed using the lung kernel. In conclusion, the spatial resolution of UHRCT images may be affected by LCD resolution and displayed image size. To optimize the clinical display conditions for UHRCT images, it is necessary to adopt an LCD with an adequate resolution for each viewing situation.
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Affiliation(s)
- Yoichiro Ikushima
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan. .,Department of Radiological Science, Faculty of Health Sciences, Junshin Gakuen University, 1-1-1 Chikushigaoka, Minami-ku, Fukuoka, 815-8510, Japan.
| | - Shogo Tokurei
- Department of Radiological Science, Faculty of Health Sciences, Junshin Gakuen University, 1-1-1 Chikushigaoka, Minami-ku, Fukuoka, 815-8510, Japan
| | - Shusaku Sato
- Department of Radiological Technology, Yamaguchi University Hospital, 1-1-1 MinamiKogushi, Ube, 755-8505, Japan
| | - Kojiro Ikushima
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.,Department of Radiological Technology, Yamaguchi University Hospital, 1-1-1 MinamiKogushi, Ube, 755-8505, Japan
| | | | - Junji Morishita
- Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Hidetake Yabuuchi
- Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
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8
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Takahara K, Ohno Y, Fukaya K, Matsukiyo R, Nukaya T, Takenaka M, Zennami K, Ichino M, Fukami N, Sasaki H, Kusaka M, Toyama H, Sumitomo M, Shiroki R. Novel Intraoperative Navigation Using Ultra-High-Resolution CT in Robot-Assisted Partial Nephrectomy. Cancers (Basel) 2022; 14:cancers14082047. [PMID: 35454953 PMCID: PMC9032210 DOI: 10.3390/cancers14082047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 04/13/2022] [Accepted: 04/15/2022] [Indexed: 02/04/2023] Open
Abstract
Simple Summary Successful surgery in robot-assisted partial nephrectomy (RAPN), especially for highly complex tumors, relies on a detailed understanding of the anatomical relations of the tumor absolute and relative to the urinary tract and the vascular structures, including the renal pedicle. Intraoperative navigation with accurate information regarding tumor position relative to the surrounding urinary vascular structures undoubtedly assists the surgeon during RAPN. In this report, we performed RAPN with intraoperative navigation using a novel computed tomography scanner (UHR-CT) and compared its perioperative and short-term functional outcomes to those of area-detector CT (ADCT). We found that this novel navigation system using UHR-CT provided a shorter warm ischemia time and lower estimated blood loss than ADCT, and concluded this could be a useful tool for patients who undergo RAPN. This is the first report to evaluate the feasibility and usefulness of UHR-CT for intraoperative navigation during RAPN. Abstract To assess the perioperative and short-term functional outcomes of robot-assisted partial nephrectomy (RAPN) with intraoperative navigation using an ultra-high-resolution computed tomography (UHR-CT) scanner, we retrospectively analyzed 323 patients who underwent RAPN using an UHR-CT or area-detector CT (ADCT). Perioperative outcomes and the postoperative preservation ratio of estimated glomerular filtration rate (eGFR) were compared. After the propensity score matching, we evaluated 99 patients in each group. Although the median warm ischemia time (WIT) was less than 25 min in both groups, it was significantly shorter in the UHR-CT group than in the ADCT group (15 min vs. 17 min, p = 0.032). Moreover, the estimated blood loss (EBL) was significantly lower in the UHR-CT group than in the ADCT group (33 mL vs. 50 mL, p = 0.028). However, there were no significant intergroup differences in the postoperative preservation ratio of eGFR at 3 or 6 months of follow-up (ADCT 91.8% vs. UHR-CT 93.5%, p = 0.195; and ADCT 91.7% vs. UHR-CT 94.0%, p = 0.160, respectively). Although no differences in short-term renal function were observed in intraoperative navigation for RAPN in this propensity score–matched cohort, this study is the first to demonstrate that UHR-CT resulted in a shorter WIT and lower EBL than ADCT.
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Affiliation(s)
- Kiyoshi Takahara
- Department of Urology, Fujita-Health University School of Medicine, Nagoya 470-1192, Japan; (K.F.); (T.N.); (M.T.); (K.Z.); (M.I.); (H.S.); (M.S.); (R.S.)
- Correspondence: ; Tel.: +81-562-93-2884
| | - Yoshiharu Ohno
- Department of Radiology, Fujita-Health University School of Medicine, Nagoya 470-1192, Japan; (Y.O.); (R.M.); (H.T.)
| | - Kosuke Fukaya
- Department of Urology, Fujita-Health University School of Medicine, Nagoya 470-1192, Japan; (K.F.); (T.N.); (M.T.); (K.Z.); (M.I.); (H.S.); (M.S.); (R.S.)
| | - Ryo Matsukiyo
- Department of Radiology, Fujita-Health University School of Medicine, Nagoya 470-1192, Japan; (Y.O.); (R.M.); (H.T.)
| | - Takuhisa Nukaya
- Department of Urology, Fujita-Health University School of Medicine, Nagoya 470-1192, Japan; (K.F.); (T.N.); (M.T.); (K.Z.); (M.I.); (H.S.); (M.S.); (R.S.)
| | - Masashi Takenaka
- Department of Urology, Fujita-Health University School of Medicine, Nagoya 470-1192, Japan; (K.F.); (T.N.); (M.T.); (K.Z.); (M.I.); (H.S.); (M.S.); (R.S.)
| | - Kenji Zennami
- Department of Urology, Fujita-Health University School of Medicine, Nagoya 470-1192, Japan; (K.F.); (T.N.); (M.T.); (K.Z.); (M.I.); (H.S.); (M.S.); (R.S.)
| | - Manabu Ichino
- Department of Urology, Fujita-Health University School of Medicine, Nagoya 470-1192, Japan; (K.F.); (T.N.); (M.T.); (K.Z.); (M.I.); (H.S.); (M.S.); (R.S.)
| | - Naohiko Fukami
- Department of Urology, Okazaki Medical Center, Fujita Health University, Okazaki 444-0827, Japan; (N.F.); (M.K.)
| | - Hitomi Sasaki
- Department of Urology, Fujita-Health University School of Medicine, Nagoya 470-1192, Japan; (K.F.); (T.N.); (M.T.); (K.Z.); (M.I.); (H.S.); (M.S.); (R.S.)
| | - Mamoru Kusaka
- Department of Urology, Okazaki Medical Center, Fujita Health University, Okazaki 444-0827, Japan; (N.F.); (M.K.)
| | - Hiroshi Toyama
- Department of Radiology, Fujita-Health University School of Medicine, Nagoya 470-1192, Japan; (Y.O.); (R.M.); (H.T.)
| | - Makoto Sumitomo
- Department of Urology, Fujita-Health University School of Medicine, Nagoya 470-1192, Japan; (K.F.); (T.N.); (M.T.); (K.Z.); (M.I.); (H.S.); (M.S.); (R.S.)
| | - Ryoichi Shiroki
- Department of Urology, Fujita-Health University School of Medicine, Nagoya 470-1192, Japan; (K.F.); (T.N.); (M.T.); (K.Z.); (M.I.); (H.S.); (M.S.); (R.S.)
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9
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Celi S, Vignali E, Capellini K, Gasparotti E. On the Role and Effects of Uncertainties in Cardiovascular in silico Analyses. FRONTIERS IN MEDICAL TECHNOLOGY 2022; 3:748908. [PMID: 35047960 PMCID: PMC8757785 DOI: 10.3389/fmedt.2021.748908] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 10/14/2021] [Indexed: 12/13/2022] Open
Abstract
The assessment of cardiovascular hemodynamics with computational techniques is establishing its fundamental contribution within the world of modern clinics. Great research interest was focused on the aortic vessel. The study of aortic flow, pressure, and stresses is at the basis of the understanding of complex pathologies such as aneurysms. Nevertheless, the computational approaches are still affected by sources of errors and uncertainties. These phenomena occur at different levels of the computational analysis, and they also strongly depend on the type of approach adopted. With the current study, the effect of error sources was characterized for an aortic case. In particular, the geometry of a patient-specific aorta structure was segmented at different phases of a cardiac cycle to be adopted in a computational analysis. Different levels of surface smoothing were imposed to define their influence on the numerical results. After this, three different simulation methods were imposed on the same geometry: a rigid wall computational fluid dynamics (CFD), a moving-wall CFD based on radial basis functions (RBF) CFD, and a fluid-structure interaction (FSI) simulation. The differences of the implemented methods were defined in terms of wall shear stress (WSS) analysis. In particular, for all the cases reported, the systolic WSS and the time-averaged WSS (TAWSS) were defined.
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Affiliation(s)
- Simona Celi
- BioCardioLab, UOC Bioingegneria, Fondazione Toscana Gabriele Monasterio, Massa, Italy
| | - Emanuele Vignali
- BioCardioLab, UOC Bioingegneria, Fondazione Toscana Gabriele Monasterio, Massa, Italy
| | - Katia Capellini
- BioCardioLab, UOC Bioingegneria, Fondazione Toscana Gabriele Monasterio, Massa, Italy.,Department of Information Engineering, University of Pisa, Pisa, Italy
| | - Emanuele Gasparotti
- BioCardioLab, UOC Bioingegneria, Fondazione Toscana Gabriele Monasterio, Massa, Italy.,Department of Information Engineering, University of Pisa, Pisa, Italy
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Hoshika M. [4. Physical Evaluation of Ultra-high-resolution Computed Tomography -Cranial Region]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2021; 77:397-405. [PMID: 33883375 DOI: 10.6009/jjrt.2021_jsrt_77.4.397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Minori Hoshika
- Division of Radiology, Department of Medical Technology, Okayama University Hospital
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11
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Urikura A, Yoshida T, Nakaya Y, Nishimaru E, Hara T, Endo M. Deep learning-based reconstruction in ultra-high-resolution computed tomography: Can image noise caused by high definition detector and the miniaturization of matrix element size be improved? Phys Med 2021; 81:121-129. [DOI: 10.1016/j.ejmp.2020.12.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 11/15/2020] [Accepted: 12/07/2020] [Indexed: 01/17/2023] Open
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12
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Matsukiyo R, Ohno Y, Matsuyama T, Nagata H, Kimata H, Ito Y, Ogawa Y, Murayama K, Kato R, Toyama H. Deep learning-based and hybrid-type iterative reconstructions for CT: comparison of capability for quantitative and qualitative image quality improvements and small vessel evaluation at dynamic CE-abdominal CT with ultra-high and standard resolutions. Jpn J Radiol 2020; 39:186-197. [PMID: 33037956 DOI: 10.1007/s11604-020-01045-w] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 09/11/2020] [Indexed: 12/15/2022]
Abstract
PURPOSE To determine the image quality improvement including vascular structures using deep learning reconstruction (DLR) for ultra-high-resolution CT (UHR-CT) and area-detector CT (ADCT) compared to a commercially available hybrid-iterative reconstruction (IR) method. MATERIALS AND METHOD Thirty-two patients suspected of renal cell carcinoma underwent dynamic contrast-enhanced (CE) CT using UHR-CT or ADCT systems. CT value and contrast-to-noise ratio (CNR) on each CT dataset were assessed with region of interest (ROI) measurements. For qualitative assessment of improvement for vascular structure visualization, each artery was assessed using a 5-point scale. To determine the utility of DLR, CT values and CNRs were compared among all UHR-CT data by means of ANOVA followed by Bonferroni post hoc test, and same values on ADCT data were also compared between hybrid IR and DLR methods by paired t test. RESULTS For all arteries except the aorta, the CT value and CNR of the DLR method were significantly higher compared to those of the hybrid-type IR method in both CT systems reconstructed as 512 or 1024 matrixes (p < 0.05). CONCLUSION DLR has a higher potential to improve the image quality resulting in a more accurate evaluation for vascular structures than hybrid IR for both UHR-CT and ADCT.
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Affiliation(s)
- Ryo Matsukiyo
- Department of Radiology, Fujita Health University School of Medicine, 1-98, Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Yoshiharu Ohno
- Department of Radiology, Fujita Health University School of Medicine, 1-98, Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan. .,Joint Research Laboratory of Advanced Medical Imaging, Fujita Health University School of Medicine, 1-98, Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.
| | - Takahiro Matsuyama
- Department of Radiology, Fujita Health University School of Medicine, 1-98, Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Hiroyuki Nagata
- Department of Radiology, Fujita Health University School of Medicine, 1-98, Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Hirona Kimata
- Canon Medical Systems Corporation, 1385 Shimoishigami, Otawara-shi, Tochigi, 324-8550, Japan
| | - Yuya Ito
- Canon Medical Systems Corporation, 1385 Shimoishigami, Otawara-shi, Tochigi, 324-8550, Japan
| | - Yukihiro Ogawa
- Canon Medical Systems Corporation, 1385 Shimoishigami, Otawara-shi, Tochigi, 324-8550, Japan
| | - Kazuhiro Murayama
- Joint Research Laboratory of Advanced Medical Imaging, Fujita Health University School of Medicine, 1-98, Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Ryoichi Kato
- Department of Radiology, Fujita Health University School of Medicine, 1-98, Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
| | - Hiroshi Toyama
- Department of Radiology, Fujita Health University School of Medicine, 1-98, Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan
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