1
|
Higuchi A, Kubota Y, Yokota H, Miyazaki H, Ota J, Okafuji Y, Takaoka H, Uno T. Computed tomography angiography assessment of Adamkiewicz artery with sublingual nitroglycerin administration. Neuroradiology 2024:10.1007/s00234-024-03433-9. [PMID: 39102086 DOI: 10.1007/s00234-024-03433-9] [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: 03/19/2024] [Accepted: 07/11/2024] [Indexed: 08/06/2024]
Abstract
PURPOSE Identification of the Adamkiewicz artery before aortic surgery is important for preventing postoperative complications due to spinal cord ischemia. The Adamkiewicz artery is difficult to identify due to its small diameter. Nitroglycerin has a vasodilatory effect and is used clinically to improve visualization of blood vessels on coronary computed tomography (CT) angiography. We investigated whether the vasodilatory effect of nitroglycerin could improve the ability to visualize the Adamkiewicz artery. METHODS We extracted 33 cases wherein contrast-enhanced CT images were taken before and after aortic aneurysm surgery. Nitroglycerin was administered for coronary artery evaluation on the preoperative CT. However, no nitroglycerin was administered before the postoperative CT. Aortic contrast-to-noise ratio, CT value, image noise, and diameter of the Adamkiewicz artery and anterior spinal artery were measured. The depiction of the Adamkiewicz artery was graded into four grades and evaluated. These measurements were performed by two independent reviewers. RESULTS In nitroglycerin-administered cases, the contrast-to-noise ratio and CT values were significantly higher (P < 0.001, P < 0.001, respectively); the Adamkiewicz artery and anterior spinal artery diameters were dilated (P = 0.005, P = 0.001, respectively). The Adamkiewicz artery score also improved significantly (P < 0.001). No significant difference was found in image noise. CONCLUSION Nitroglycerin contributed to improving the Adamkiewicz artery's visualization.
Collapse
Affiliation(s)
- Akio Higuchi
- Department of Radiology, Chiba University Hospital, Chiba, Japan
| | - Yoshihiro Kubota
- Department of Radiology, Chiba University Hospital, Chiba, Japan.
| | - Hajime Yokota
- Department of Diagnostic Radiology and Radiation Oncology, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Hiroki Miyazaki
- Department of Radiology, Chiba University Hospital, Chiba, Japan
| | - Joji Ota
- Department of Radiology, Chiba University Hospital, Chiba, Japan
| | - Yasuaki Okafuji
- Department of Radiology, Numazu City Hospital, Shizuoka, Japan
| | - Hiroyuki Takaoka
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Takashi Uno
- Department of Diagnostic Radiology and Radiation Oncology, Chiba University Graduate School of Medicine, Chiba, Japan
| |
Collapse
|
2
|
Lu G, Su Y, Jiang Y, Yang L, Wang Y, Shi G, Zhang F, Duan X, Hu H. Improving the visualisation of perforator arteries for anterolateral thigh flaps harvest in CT angiography via sublingual glyceryl trinitrate. Clin Radiol 2023; 78:e791-e797. [PMID: 37574403 DOI: 10.1016/j.crad.2023.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 07/05/2023] [Accepted: 07/08/2023] [Indexed: 08/15/2023]
Abstract
AIM To investigate the improvement of image quality and visualisation of the anterolateral thigh (ALT) flap perforators on computed tomography angiography (CTA) after administration of sublingual glyceryl trinitrate (GTN). MATERIALS AND METHODS Sixty patients with oral lesions received thigh CTA examinations were divided randomly into two groups after administration of sublingual GTN (GTN group) or without administration of sublingual GTN (non-GTN group). Two radiologists calculated the signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and assessed the image quality of each vessel. Besides, the grade of thigh artery, the lumen diameter of deep femoral artery, lateral circumflex femoral artery (LCFA), the descending branch of LCFA and its proximal and distal perforators, and the number and type of visible perforators were evaluated quantitatively. RESULTS The SNR and CNR were not significantly different between the two groups (p>0.05). The image quality of CTA in the GTN group was significantly better than that in the non-GTN group (p<0.01). The lumen diameters of the deep femoral artery, LCFA, the descending branch of LCFA and its perforators were significantly larger in the GTN group than those in the non-GTN group (p<0.01). Compared with the non-GTN group, the number of visible perforators and the number of visible septocutaneous perforators were significantly more in the GTN group, and the qualitative grade of visible perforators was significantly higher (p<0.001). CONCLUSIONS The administration of sublingual GTN in preoperative thigh CTA can improve the image quality and visualisation of perforator vessels, thus could help surgeons to select the optimum ALT flaps.
Collapse
Affiliation(s)
- G Lu
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangdong, China
| | - Y Su
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangdong, China
| | - Y Jiang
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangdong, China
| | - L Yang
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangdong, China
| | - Y Wang
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangdong, China
| | - G Shi
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangdong, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Medical Research Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - F Zhang
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangdong, China
| | - X Duan
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangdong, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Medical Research Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.
| | - H Hu
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangdong, China.
| |
Collapse
|
3
|
Yang L, Yan Z, Lu G, Jiang Y, Wang Y, Shi G, Chen L, Hu H, Duan X. Nitroglycerin improves the visibility of fibula-free flap perforators on computed tomography angiography in patients with oral or maxillofacial lesion. Eur J Radiol 2023; 164:110877. [PMID: 37187079 DOI: 10.1016/j.ejrad.2023.110877] [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: 11/30/2022] [Revised: 04/30/2023] [Accepted: 05/05/2023] [Indexed: 05/17/2023]
Abstract
PURPOSE To investigate the improvement of image quality and visualization of fibula-free flap (FFF) perforators on computed tomography angiography (CTA) after administration of sublingual nitroglycerin (NTG) tablets. METHODS A total of 60 patients with oral or maxillofacial lesions before CTA of the lower extremity were randomly divided into two groups (NTG group and non-NTG group). The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR), overall image quality and grading of vessels were evaluated and compared. The lumen diameters of the major arteries and the proximal and distal peroneal perforators were measured. The number of visible perforators in muscular clearance and muscular layer was also counted and compared between the two groups. RESULTS The CNR of posterior tibial artery and overall image quality of CTA images in the NTG group was significantly higher than that in the non-NTG group (p < 0.05), although the SNR and CNR of other arteries did not show significant differences (p > 0.05). The lumen diameters of the peroneal artery and its perforators, anterior tibial artery, and posterior tibial artery were significantly larger in the NTG group (p < 0.001), while no significant difference prevailed in the diameter of the popliteal artery between the two groups (p = 0.298). Compared with the non-NTG group, a significant increase in the number of visible perforators was noted in the NTG group (p < 0.001). CONCLUSIONS The administration of sublingual NTG in CTA of the lower extremity can improve the image quality and visualization of perforators, which aids to surgeons select the optimum FFF.
Collapse
Affiliation(s)
- Lingjie Yang
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Road West, Guangzhou 510120, Guangdong, China
| | - Zhuoheng Yan
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Road West, Guangzhou 510120, Guangdong, China
| | - Guoxiong Lu
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Road West, Guangzhou 510120, Guangdong, China
| | - Yusong Jiang
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Road West, Guangzhou 510120, Guangdong, China
| | - Yu Wang
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Road West, Guangzhou 510120, Guangdong, China
| | - Guangzi Shi
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Road West, Guangzhou 510120, Guangdong, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Medical Research Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Lina Chen
- CHN DI CT Collaboration, Siemens Healthcare Ltd, No.399 West Haiyang Road, Shanghai 200126, China
| | - Huijun Hu
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Road West, Guangzhou 510120, Guangdong, China
| | - Xiaohui Duan
- Department of Radiology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 Yanjiang Road West, Guangzhou 510120, Guangdong, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Medical Research Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.
| |
Collapse
|
4
|
Gupta S, Dixit R, Prakash A, Daga MK, Mishra A. Can Sublingual Nitrate Improve Visualization of Lower Limb Arteries on Computed Tomography Angiography? J Comput Assist Tomogr 2023:00004728-990000000-00152. [PMID: 36877793 DOI: 10.1097/rct.0000000000001446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Abstract
OBJECTIVE The aim of the study is to evaluate the role of sublingual nitrate in improving vessel visualization on peripheral computed tomography angiography (CTA). METHODS Fifty patients clinically diagnosed with peripheral arterial disease of the lower limb were prospectively included in this study: Twenty-five underwent CTA after sublingual nitrate administration (nitrate group) and 25 without (non-nitrate group). Two blinded observers qualitatively and quantitatively assessed the data thus generated. The mean luminal diameter, intraluminal attenuation, site, and percentage of stenosis were evaluated in all segments. Assessment of collateral visualization at sites of significant stenosis was also done. RESULTS Patients in the nitrate and non-nitrate groups were similar in age and sex characteristics (P > 0.05).On subjective evaluation, there was significantly improved visualization of the femoropopliteal and tibioperoneal vasculature of the lower limb in the nitrate group compared with the non-nitrate group (P < 0.05). Quantitative evaluation showed a statistically significant difference in the measured arterial diameters for all evaluated segments in the nitrate group versus the non-nitrate group (P < 0.05). Intra-arterial attenuation was significantly greater for all segments in the nitrate group resulting in better contrast opacification in these studies. Collateral visualization around segments with more than 50% stenosis/occlusion was also better in the nitrate group. CONCLUSIONS Our study suggests that nitrate administration before peripheral vascular CTA can improve visualization, especially in the distal segments by increasing the vessel diameter and intraluminal attenuation along with better delineation of the collateral circulation around stenotic areas. It may also improve the number of evaluable segments of vasculature in these angiographic studies.
Collapse
Affiliation(s)
- Sanchita Gupta
- From the Department of Radiodiagnosis, Maulana Azad Medical College, New Delhi, India
| | - Rashmi Dixit
- From the Department of Radiodiagnosis, Maulana Azad Medical College, New Delhi, India
| | - Anjali Prakash
- From the Department of Radiodiagnosis, Maulana Azad Medical College, New Delhi, India
| | - Mradul Kumar Daga
- Department of Internal Medicine and Infectious disease, Institute of Liver and Biliary Sciences, New Delhi, India
| | - Anurag Mishra
- Department of Surgery, Maulana Azad Medical College, New Delhi, India
| |
Collapse
|
5
|
Cayot B, Milot L, Valette PJ. Improved visualization of arterial supply of hepatic tumors during CT angiography using sublingual administration of glyceryl trinitrate. Diagn Interv Imaging 2023; 104:160-161. [PMID: 36283932 DOI: 10.1016/j.diii.2022.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/11/2022] [Accepted: 10/11/2022] [Indexed: 11/16/2022]
Affiliation(s)
- Bénédicte Cayot
- Body and VIR Radiology Department, Hospices Civils de Lyon, Hôpital Edouard Herriot, 69003 Lyon, France.
| | - Laurent Milot
- Body and VIR Radiology Department, Hospices Civils de Lyon, Hôpital Edouard Herriot, 69003 Lyon, France
| | - Pierre-Jean Valette
- Body and VIR Radiology Department, Hospices Civils de Lyon, Hôpital Edouard Herriot, 69003 Lyon, France
| |
Collapse
|
6
|
Sugisawa K, Ichikawa K, Urikura A, Minamishima K, Masuda S, Hoshino T, Nakahara A, Yamada Y, Jinzaki M. Spatial resolution compensation by adjusting the reconstruction kernels for iterative reconstruction images of computed tomography. Phys Med 2020; 74:47-55. [PMID: 32408219 DOI: 10.1016/j.ejmp.2020.05.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 04/26/2020] [Accepted: 05/03/2020] [Indexed: 11/24/2022] Open
Abstract
PURPOSE Hybrid iterative reconstruction (IR) is useful to reduce noise in computed tomography (CT) images. However, it often decreases the spatial resolution. The ability of high spatial resolution kernels (harder kernels) to compensate for the decrease in the spatial resolution of hybrid IRs was investigated. METHODS An elliptic cylindrical phantom simulating an adult abdomen was used. Two types of rod-shaped objects with ~330 and ~130 HU were inserted to simulate contrasts of arteries in CT angiography. Two multi-slice CT systems were used to scan the phantoms with 120 kVp and scan doses of 20 and 10 mGy. The task transfer functions (TTFs) were measured from the circular edges of the rod images. The noise power spectrum (NPS) was measured from the images of the water-only section. The CT images were reconstructed using a filtered back projection (FBP) with baseline kernels and two levels of hybrid IRs with harder kernels. The profiles of the clinical images across the aortic dissection flaps were measured to evaluate actual spatial resolutions. RESULTS The TTF degradation of each hybrid IR was recovered by the harder kernels, whereas the noise reduction effect was retained, for both the 20 and 10 mGy. The profiles of the dissection flaps for the FBP were maintained by using the harder kernels. Even with the best combination of hybrid IR and harder kernel, the noise level at 10 mGy was not reduced to the level of FBP at 20 mGy, suggesting no capability of a 50% dose reduction while maintaining noise.
Collapse
Affiliation(s)
- Koichi Sugisawa
- Department of Radiological Technology, Keio University Hospital, 35 Shinanomachi, Shinjuku, Tokyo 160 8582, Japan; Division of Health Sciences, Graduate School of Medical Science, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa 920 0942, Japan
| | - Katsuhiro Ichikawa
- Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, Ishikawa 920 0942, Japan.
| | - Atsushi Urikura
- Department of Diagnostic Radiology, Shizuoka Cancer Center, 1007 Shimonagakubo, Nagaizumi, Sunto, Shizuoka 411 8777, Japan
| | - Kazuya Minamishima
- Department of Radiological Technology, Keio University Hospital, 35 Shinanomachi, Shinjuku, Tokyo 160 8582, Japan
| | - Shota Masuda
- Department of Radiological Technology, Keio University Hospital, 35 Shinanomachi, Shinjuku, Tokyo 160 8582, Japan
| | - Takashi Hoshino
- Department of Radiological Technologist, Osaka College of High Technology, 1-2-43 Miyahara, Osaka Yodogawa, Osaka 532 0003, Japan
| | - Akiko Nakahara
- Department of Radiology, Tokyo Metropolitan Health and Medical Treatment Corporation Toshima Hospital, 33-1 Sakaecho, Itabashi, Tokyo 173 0015, Japan
| | - Yoshitake Yamada
- Department of Diagnostic Radiology, Keio University School of Medicine, 35, Shinanomachi, Shinjuku, Tokyo 160 8582, Japan
| | - Masahiro Jinzaki
- Department of Diagnostic Radiology, Keio University School of Medicine, 35, Shinanomachi, Shinjuku, Tokyo 160 8582, Japan
| |
Collapse
|