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Saukhat O, Mushailov A, Kleinbaum Y, Barash Y, Klang E, Nachmany I, Horesh N. Ultrasound-Tomographic Image Fusion - A Novel Tool for Follow up After Acute Complicated Appendicitis. Surg Innov 2023. [PMID: 36866417 DOI: 10.1177/15533506231161122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
BACKGROUND Computerized tomography (CT) is an integral part of the follow-up and decision-making process in complicated acute appendicitis (AA) treated non-operatively. However, repeated CT scans are costly and cause radiation exposure. Ultrasound-tomographic image fusion is a novel tool that integrates CT images to an Ultrasound (US) machine, thus allowing accurate assessment of the healing process compared to CT on presentation. In this study, we aimed to assess the feasibility of US-CT fusion as part of the management of appendicitis. MATERIALS AND METHODS We retrospectively collected data of consecutive patients with complicated AA managed non-operatively and followed up with US Fusion for clinical decision-making. Patients demographics, clinical data, and follow-up outcomes were extracted and analyzed. RESULTS Overall, 19 patients were included. An index Fusion US was conducted in 13 patients (68.4%) during admission, while the rest were performed as part of an ambulatory follow-up. Nine patients (47.3%) had more than 1 US Fusion performed as part of their follow-up, and 3 patients underwent a third US Fusion. Eventually, 5 patients (26.3%) underwent elective interval appendectomy based on the outcomes of the US Fusion, due to a non-resolution of imaging findings and ongoing symptoms. In 10 patients (52.6%), there was no evidence of an abscess in the repeated US Fusion, while in 3 patients (15.8%), it significantly diminished to less than 1 cm in diameter. CONCLUSION Ultrasound-tomographic image fusion is feasible and can play a significant role in the decision-making process for the management of complicated AA.
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Affiliation(s)
- Olga Saukhat
- Department of Diagnostic Imaging, 26744Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel.,Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Avital Mushailov
- Department of Diagnostic Imaging, 26744Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel.,Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yeruham Kleinbaum
- Department of Diagnostic Imaging, 26744Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel.,Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yiftach Barash
- Department of Diagnostic Imaging, 26744Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel.,Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Eyal Klang
- Department of Diagnostic Imaging, 26744Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel.,Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Ido Nachmany
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Department of General Surgery and Transplantations, 26744Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel
| | - Nir Horesh
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Department of General Surgery and Transplantations, 26744Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel
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2
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Singh BS, Cazacu IM, Deza CA, Rigaud BS, Saftoiu A, Gruionu G, Guionu L, Brock KK, Koay EJ, Herman JM, Bhutani MS. Image Fusion Involving Real-Time Transabdominal or Endoscopic Ultrasound for Gastrointestinal Malignancies: Review of Current and Future Applications. Diagnostics (Basel) 2022; 12:diagnostics12123218. [PMID: 36553225 PMCID: PMC9777678 DOI: 10.3390/diagnostics12123218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/10/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
Image fusion of CT, MRI, and PET with endoscopic ultrasound and transabdominal ultrasound can be promising for GI malignancies as it has the potential to allow for a more precise lesion characterization with higher accuracy in tumor detection, staging, and interventional/image guidance. We conducted a literature review to identify the current possibilities of real-time image fusion involving US with a focus on clinical applications in the management of GI malignancies. Liver applications have been the most extensively investigated, either in experimental or commercially available systems. Real-time US fusion imaging of the liver is gaining more acceptance as it enables further diagnosis and interventional therapy of focal liver lesions that are difficult to visualize using conventional B-mode ultrasound. Clinical studies on EUS guided image fusion, to date, are limited. EUS-CT image fusion allowed for easier navigation and profiling of the target tumor and/or surrounding anatomical structure. Image fusion techniques encompassing multiple imaging modalities appear to be feasible and have been observed to increase visualization accuracy during interventional and diagnostic applications.
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Affiliation(s)
- Ben S. Singh
- Department of Gastroenterology, Hepatology and Nutrition, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Irina M. Cazacu
- Department of Oncology, Fundeni Clinical Institute, 022328 Bucharest, Romania
- Faculty of Medicine, University of Medicine and Pharmacy Carol Davila, 050474 Bucharest, Romania
| | - Carlos A. Deza
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Bastien S. Rigaud
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Adrian Saftoiu
- Faculty of Medicine, University of Medicine and Pharmacy Carol Davila, 050474 Bucharest, Romania
- Department of Gastroenterology and Hepatology, Elias Emergency University Hospital, 011461 Bucharest, Romania
- Department of Gastroenterology, Ponderas Academic Hospital, 014142 Bucharest, Romania
| | - Gabriel Gruionu
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Lucian Guionu
- Department of Mechanics, University of Craiova, 200585 Craiova, Romania
| | - Kristy K. Brock
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Eugene J. Koay
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Joseph M. Herman
- Department of Radiation Medicine, Zucher School of Medicine, Hempstead, NY 11549, USA
| | - Manoop S. Bhutani
- Department of Gastroenterology, Hepatology and Nutrition, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
- Correspondence:
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3
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Zuo D, Qian JJ, Dong Y, Wang WP, Tian XF, Qiu YJ, Dietrich CF. Incidentally Detected Liver Metastases during Pancreas Contrast-enhanced Ultrasound. BIO INTEGRATION 2021; 2:135-142. [DOI: 10.15212/bioi-2021-0026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2023] Open
Abstract
Abstract Purpose: The purpose of current study was to investigate the value of the late-phase enhancement features of pancreas contrast-enhanced ultrasound (CEUS) in the detection of liver metastases in patients with pancreatic ductal adenocarcinomas (PDAC).Methods:
From October 2020 to March 2021, 86 patients were prospectively enrolled. The gold standard of liver metastatic and PDAC lesions were based on histopathologically diagnoses and multiple imaging modalities results. B-mode ultrasound (BMUS) was performed to detect suspected liver metastases
before CEUS. During the late phase of pancreas CEUS, the entire liver was scanned again to detect hypoenhanced liver metastases. Liver metastases were confirmed by biopsy and histopathological results. The number and size of liver metastases detected by BMUS and during CEUS late phase were
recorded and compared.Results: Suspected liver metastases were detected in 14 patients by BMUS (n = 23). During the late phase of CEUS, hypoenhanced liver metastases were detected in 23 patients (n = 87). When compared with BMUS, whole-liver scan during the late phase of CEUS detected
more isoechoic, small, or superficially located lesions. Compared with BMUS, the specificity, sensitivity, positive predictive value, and negative predictive value of CEUS in diagnosing of liver metastases in PDAC patients were significantly improved (96.72% vs. 100%, 48% vs. 92%, 85.71% vs.
100%, and 83.10% vs. 96.83%, respectively) (P < 0.05).Conclusion: The late phase whole liver scan during CEUS of pancreas helps to detect more liver metastases, which is important for further clinical decision-making.
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Affiliation(s)
- Dan Zuo
- Department of Ultrasound, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Ji-Jiang Qian
- Department of Ultrasound, Shaoxing Yuecheng People’s Hospital, Zhejiang 200032, China
| | - Yi Dong
- Department of Ultrasound, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Wen-Ping Wang
- Department of Ultrasound, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Xiao-Fan Tian
- Department of Ultrasound, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Yi-Jie Qiu
- Department of Ultrasound, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Christoph Frank Dietrich
- Department Allgemeine Innere Medizin (DAIM), Kliniken Hirslanden Beau Site, Salem und Permanence, Bern, Switzerland
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4
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Stavrou GA, Stang A, Raptis DA, Schadde E, Zeile M, Brüning R, Wagner KC, Huber TM, Oldhafer KJ. Intraoperative (Contrast-Enhanced) Ultrasound Has the Highest Diagnostic Accuracy of Any Imaging Modality in Resection of Colorectal Liver Metastases. J Gastrointest Surg 2021; 25:3160-3169. [PMID: 34159555 DOI: 10.1007/s11605-021-04925-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 01/14/2021] [Indexed: 01/31/2023]
Abstract
AIM Defining sensitivity, specificity, diagnostic accuracy for detection of colorectal liver metastases in imaging compared to intraoperative assessment. Defining a cutoff, where accuracy of detection is impaired. METHODS Prospective single-institution clinical trial (clinicaltrials.gov: NCT01522209). Patients underwent CEUS, MDCT, and 3 Tesla EOB-MRI within 2 weeks preoperatively. Intraoperative palpation, IOUS, and CEIOUS were performed. A patient and lesion-based database was analyzed for accuracy of detection of CEUS, CT, MRI, and Palp/IOUS/CEIOUS combined read. Histology was standard of reference. RESULTS Forty-seven high tumor load (mean 5, 4 lesions) patients were analyzed. Histopathology confirmed 264 lesions (245 malignant: 19 benign). Accuracy for detection of all lesions: CEUS 63%, CT 71%, MRI 92%, and PALP/IOUS/CEIOUS 98%. ROC analysis for lesion size showed severe impairment of accuracy in lesion detection smaller than 5mm. Intraoperative imaging was not impaired by lesion size. Patient-based analysis revealed a change of resection plan after IOUS/CEIOUS in 35% of patients. CONCLUSION At 5-mm lesion size, preoperative imaging shows a drop in accuracy of detection. In patients with multiple lesions, addition of MRI to MDCT seems useful. Accuracy of intraoperative ultrasound is not impacted by lesion size and should be mandatory. CEIOUS can improve intraoperative decision-making. TRIAL REGISTRATION Study registered with clinicaltrials.gov : NCT01522209.
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Affiliation(s)
- Gregor A Stavrou
- Department of General, Visceral and Thoracic Surgery, Surgical Oncology, Klinikum Saarbruecken General Hospital, Saarbruecken, Germany. .,Semmelweis Medical Faculty, Asklepios Campus Hamburg, Hamburg, Germany.
| | - Axel Stang
- Semmelweis Medical Faculty, Asklepios Campus Hamburg, Hamburg, Germany.,Department of Medical Oncology, Asklepios Hospital Barmbek, Hamburg, Germany
| | - Dimitri A Raptis
- Department of Surgery and Liver Transplantation, Royal Free Hospital, London, UK
| | - Erik Schadde
- Department of Surgery, Division of Surgical Oncology and Division of Transplant Surgery, Rush University Medical Center, Chicago, IL, USA.,Institute of Physiology, University of Zürich Campus Irchel, Zürich, Switzerland.,Department of Surgery, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - Martin Zeile
- Department of Radiology, Marienkrankenhaus Hamburg, Hamburg, Germany
| | - Roland Brüning
- Department of Radiology, Asklepios Hospital Barmbek, Hamburg, Germany
| | - Kim C Wagner
- Department of General and Visceral Surgery, Surgical Oncology, Asklepios Hospital Barmbek, Hamburg, Germany
| | - Tessa M Huber
- Department of General and Visceral Surgery, Surgical Oncology, Asklepios Hospital Barmbek, Hamburg, Germany
| | - Karl J Oldhafer
- Semmelweis Medical Faculty, Asklepios Campus Hamburg, Hamburg, Germany.,Department of General and Visceral Surgery, Surgical Oncology, Asklepios Hospital Barmbek, Hamburg, Germany
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5
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Qin S, Chen Y, Liu XY, Cheng WJ, Yu JL, Zhang WJ, Jiang QL, Wang YM, Wen YL, Liu GJ. Clinical Application of Contrast-Enhanced Ultrasound Using High-Frequency Linear Probe in the Detection of Small Colorectal Liver Metastases. ULTRASOUND IN MEDICINE & BIOLOGY 2017; 43:2765-2773. [PMID: 29037844 DOI: 10.1016/j.ultrasmedbio.2017.08.932] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 07/28/2017] [Accepted: 08/10/2017] [Indexed: 06/07/2023]
Abstract
To compare the performance of contrast-enhanced ultrasound (CEUS) using high-frequency linear and convex probes in the detection of small colorectal liver metastases (CRLMs). A total of 85 patients with 143 small CRLMs were evaluated. High-frequency ultrasound (US) and CEUS detected significantly more superficial lesions within 60 mm below the skin than a convex probe (p <0.05). The detection rate decreased in the chemotherapy group, especially when using a convex probe for US (p <0.05). By combining convex and linear probes, detection rates of US and CEUS were significantly higher than that of a convex or a linear probe alone (p <0.05). High-frequency US and CEUS helped to improve detection of small CRLMs and reduce the influence of chemotherapy. For patients with a high risk of CRLMs and those after chemotherapy, we recommend first scanning the liver by using a convex probe and subsequently screening the surface area of the liver and suspicious small lesions by using a linear probe.
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Affiliation(s)
- Si Qin
- Department of Medical Ultrasonics, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Yao Chen
- Department of Medical Ultrasonics, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Xiao-Yin Liu
- Department of Medical Ultrasonics, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Wen-Jie Cheng
- Department of Medical Ultrasonics, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Jun-Li Yu
- Department of Medical Ultrasonics, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Wen-Jing Zhang
- Department of Medical Ultrasonics, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Qing-Ling Jiang
- Department of Medical Ultrasonics, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Yi-Min Wang
- Department of Medical Ultrasonics, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Yan-Ling Wen
- Department of Medical Ultrasonics, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Guang-Jian Liu
- Department of Medical Ultrasonics, the Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China.
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6
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Park AY, Seo BK, Han H, Cho KR, Woo OH, Cha SH, Cha J. Clinical Value of Real-Time Ultrasonography-MRI Fusion Imaging for Second-Look Examination in Preoperative Breast Cancer Patients: Additional Lesion Detection and Treatment Planning. Clin Breast Cancer 2017; 18:261-269. [PMID: 28774783 DOI: 10.1016/j.clbc.2017.07.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 07/06/2017] [Accepted: 07/10/2017] [Indexed: 11/26/2022]
Abstract
BACKGROUND This study was conducted to evaluate the clinical effect of real-time magnetic resonance imaging (MRI)-navigated ultrasonography (US) for preoperative second-look examination in patients with breast cancer. PATIENTS AND METHODS Between October 2013 and February 2015, 232 patients with breast cancer underwent MRI for staging; second-look US was performed in 70 patients to evaluate additional lesions suspected to be disease detected using MRI. We retrospectively included 67 lesions in 55 patients. Lesions were classified as detected on conventional US (group 1), and not visible on conventional US, but detected on MRI-navigated US (group 2). The imaging features between groups 1 and 2 were compared using Student t, χ2, or Fisher exact tests. We compared the detection rate and histopathology of additional lesions using a McNemar test. RESULTS Heterogeneous background echotexture (69.6% [16 of 23] vs. 34.1% [14 of 41]) and lesion isoechogenicity (65.2% [15 of 23] vs. 7.3% [3 of 41]) on US and middle or posterior lesion depth on MRI (78.3% [18 of 23] vs. 46.3% [19 of 41]) were more common in group 2 (P < .05). More lesions were detected using MRI-navigated US (64 of 67; 95.5%) than conventional US (41 of 67; 61.2%; P < .01). Using MRI-navigated US we found more high-risk or malignant lesions than conventional US (21 vs. 11; P < .01). The optimal treatment plan was determined for 9 of 16 (56.3%) patients by virtue of MRI-navigated US. CONCLUSION Real-time MRI-navigated US significantly improved the detection of additional high-risk or malignant lesions during second-look US in preoperative evaluation of patients with breast cancer and ultimately determined the optimal treatment plan.
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Affiliation(s)
- Ah Young Park
- Department of Radiology, Korea University Ansan Hospital, Korea University College of Medicine, Gyeonggi-do, Republic of Korea; Department of Radiology, Kangwon National University Hospital, Kangwon National University College of Medicine, Chuncheon-si, Republic of Korea; Department of Radiology, CHA Bundang Medical Center, CHA University, Gyeonggi-do, Republic of Korea
| | - Bo Kyoung Seo
- Department of Radiology, Korea University Ansan Hospital, Korea University College of Medicine, Gyeonggi-do, Republic of Korea.
| | - Heon Han
- Department of Radiology, Kangwon National University Hospital, Kangwon National University College of Medicine, Chuncheon-si, Republic of Korea
| | - Kyu Ran Cho
- Department of Radiology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Ok Hee Woo
- Department of Radiology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Sang Hoon Cha
- Department of Radiology, Korea University Ansan Hospital, Korea University College of Medicine, Gyeonggi-do, Republic of Korea
| | - Jaehyung Cha
- Medical Science Research Center, Korea University Ansan Hospital, Gyeonggi-do, Republic of Korea
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7
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Park AY, Seo BK. Real-Time MRI Navigated Ultrasound for Preoperative Tumor Evaluation in Breast Cancer Patients: Technique and Clinical Implementation. Korean J Radiol 2016; 17:695-705. [PMID: 27587958 PMCID: PMC5007396 DOI: 10.3348/kjr.2016.17.5.695] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 06/17/2016] [Indexed: 11/15/2022] Open
Abstract
Real-time magnetic resonance imaging (MRI) navigated ultrasound is an image fusion technique to display the results of both MRI and ultrasonography on the same monitor. This system is a promising technique to improve lesion detection and analysis, to maximize advantages of each imaging modality, and to compensate the disadvantages of both MRI and ultrasound. In evaluating breast cancer stage preoperatively, MRI and ultrasound are the most representative imaging modalities. However, sometimes difficulties arise in interpreting and correlating the radiological features between these two different modalities. This pictorial essay demonstrates the technical principles of the real-time MRI navigated ultrasound, and clinical implementation of the system in preoperative evaluation of tumor extent, multiplicity, and nodal status in breast cancer patients.
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Affiliation(s)
- Ah Young Park
- Department of Radiology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan 15355, Korea
| | - Bo Kyoung Seo
- Department of Radiology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan 15355, Korea
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Fontanarosa D, van der Meer S, Bamber J, Harris E, O'Shea T, Verhaegen F. Review of ultrasound image guidance in external beam radiotherapy: I. Treatment planning and inter-fraction motion management. Phys Med Biol 2015; 60:R77-114. [PMID: 25592664 DOI: 10.1088/0031-9155/60/3/r77] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
In modern radiotherapy, verification of the treatment to ensure the target receives the prescribed dose and normal tissues are optimally spared has become essential. Several forms of image guidance are available for this purpose. The most commonly used forms of image guidance are based on kilovolt or megavolt x-ray imaging. Image guidance can also be performed with non-harmful ultrasound (US) waves. This increasingly used technique has the potential to offer both anatomical and functional information.This review presents an overview of the historical and current use of two-dimensional and three-dimensional US imaging for treatment verification in radiotherapy. The US technology and the implementation in the radiotherapy workflow are described. The use of US guidance in the treatment planning process is discussed. The role of US technology in inter-fraction motion monitoring and management is explained, and clinical studies of applications in areas such as the pelvis, abdomen and breast are reviewed. A companion review paper (O'Shea et al 2015 Phys. Med. Biol. submitted) will extensively discuss the use of US imaging for intra-fraction motion quantification and novel applications of US technology to RT.
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Affiliation(s)
- Davide Fontanarosa
- Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Developmental Biology, Maastricht University Medical Center (MUMC), Maastricht 6201 BN, the Netherlands. Oncology Solutions Department, Philips Research, High Tech Campus 34, Eindhoven 5656 AE, the Netherlands
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9
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Subject-specific real-time respiratory liver motion compensation method for ultrasound-MRI/CT fusion imaging. Int J Comput Assist Radiol Surg 2014; 10:517-29. [DOI: 10.1007/s11548-014-1085-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 05/29/2014] [Indexed: 11/26/2022]
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10
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Mauri G, Cova L, De Beni S, Ierace T, Tondolo T, Cerri A, Goldberg SN, Solbiati L. Real-time US-CT/MRI image fusion for guidance of thermal ablation of liver tumors undetectable with US: results in 295 cases. Cardiovasc Intervent Radiol 2014; 38:143-51. [PMID: 24806953 DOI: 10.1007/s00270-014-0897-y] [Citation(s) in RCA: 150] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Accepted: 03/17/2014] [Indexed: 12/12/2022]
Abstract
PURPOSE This study was designed to assess feasibility of US-CT/MRI fusion-guided ablation in liver tumors undetectable with US. METHODS From 2002 to 2012, 295 tumors (162 HCCs and 133 metastases; mean diameter 1.3 ± 0.6 cm, range 0.5-2.5 cm) detectable on contrast-enhanced CT/MRI, but completely undetectable with unenhanced US and either totally undetectable or incompletely conspicuous with contrast-enhanced US (CEUS), were treated in 215 sessions using either internally cooled radiofrequency or microwave with standard ablation protocols, guided by an image fusion system (Virtual Navigation System, Esaote S.p.A., Genova, Italy) that combines US with CT/ MRI images. Correct targeting and successful ablation of tumor were verified after 24 hours with CT or MRI. RESULTS A total of 282 of 295 (95.6 %) tumors were correctly targeted with successful ablation achieved in 266 of 295 (90.2 %). Sixteen of 295 (5.4 %) tumors were correctly targeted, but unsuccessfully ablated, and 13 of 295 (4.4 %) tumors were unsuccessfully ablated due to inaccurate targeting. There were no perioperative deaths. Major complications were observed in 2 of the 215 treatments sessions (0.9 %). CONCLUSIONS Real-time virtual navigation system with US-CT/MRI fusion imaging is precise for targeting and achieving successful ablation of target tumors undetectable with US alone. Therefore, a larger population could benefit from ultrasound guided ablation procedures.
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Affiliation(s)
- Giovanni Mauri
- Unit of Interventional Oncologic Radiology, Department of Diagnostic Imaging, Azienda Ospedaliera Ospedale di Circolo di Busto Arsizio, Busto Arsizio, Varese, Italy,
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11
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Kruse DE, Ferrara KW, Caskey CF. Creation and characterization of an ultrasound and CT phantom for noninvasive ultrasound thermometry calibration. IEEE Trans Biomed Eng 2013; 61:502-12. [PMID: 24107918 DOI: 10.1109/tbme.2013.2282775] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Ultrasound thermometry provides noninvasive 2-D temperature monitoring, and in this paper, we have investigated the use of computed tomography (CT) radiodensity to characterize tissues to improve the accuracy of ultrasound thermometry. Agarose-based tissue-mimicking phantoms were created with glyceryl trioleate (a fat-mimicking material) concentration of 0%, 10%, 20%, 30%, 40%, and 50%. The speed of sound (SOS) of the phantoms was measured over a temperature range of 22.1-41.1 °C. CT images of the phantoms were acquired by a clinical dedicated breast CT scanner, followed by calculation of the Hounsfield units (HU). The phantom was heated with a therapeutic acoustic pulse (1.54 MHz), while RF data were acquired with a 10-MHz linear-array transducer. Two-dimensional speckle tracking was used to calculate the thermal strain offline. The tissue-dependent thermal strain parameter required for ultrasound thermometry was analyzed and correlated with CT radiodensity, followed by the validation of the temperature prediction. Results showed that the change in SOS with the temperature increase was opposite in sign between the 0%-10% and 20%-50% trioleate phantoms. The inverse of the tissue-dependent thermal strain parameter of the phantoms was correlated with the CT radiodensity (R(2) = 0.99). A blinded ultrasound thermometry study on phantoms with a trioleate range of 5%-35% demonstrated the capability to estimate the tissue-dependent thermal strain parameter and estimate temperature with error less than ~1 °C. In conclusion, CT radiodensity may provide a method for improving ultrasound thermometry in heterogeneous tissues.
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Abstract
OBJECTIVE The aim of our article is to give an overview of the current and future possibilities of real-time image fusion involving ultrasound. We present a review of the existing English-language peer-reviewed literature assessing this technique, which covers technical solutions (for ultrasound and endoscopic ultrasound), image fusion in several anatomic regions, and electromagnetic needle tracking. CONCLUSION The recent progress of real-time ultrasound in image fusion may provide several new possibilities, including diagnosis, treatment, and follow-up of oncologic patients.
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13
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Milot L, Ma K, Efford E, Sela G, Coburn N, Haider M, Piron C, Plewes D, Law C. Evaluation of a Multimodality MR/US Coregistration System for Investigation of Hepatic Metastases from Colorectal Cancer. J Vasc Interv Radiol 2013; 24:357-62. [DOI: 10.1016/j.jvir.2012.11.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Revised: 11/12/2012] [Accepted: 11/22/2012] [Indexed: 10/27/2022] Open
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14
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Puppa G, Poston G, Jess P, Nash GF, Coenegrachts K, Stang A. Staging colorectal cancer with the TNM 7 th: The presumption of innocence when applying the M category. World J Gastroenterol 2013; 19:1152-7. [PMID: 23483791 PMCID: PMC3587470 DOI: 10.3748/wjg.v19.i8.1152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Revised: 08/18/2012] [Accepted: 09/19/2012] [Indexed: 02/06/2023] Open
Abstract
One of the main changes of the current TNM-7 is the elimination of the category MX, since it has been a source of ambiguity and misinterpretation, especially by pathologists. Therefore the ultimate staging would be better performed by the patient’s clinician who can classify the disease M0 (no distant metastasis) or M1 (presence of distant metastasis), having access to the completeness of data resulting from clinical examination, imaging workup and pathology report. However this important change doesn’t take into account the diagnostic value and the challenge of small indeterminate visceral lesions encountered, in particular, during radiological staging of patients with colorectal cancer. In this article the diagnosis of these lesions with multiple imaging modalities, their frequency, significance and relevance to staging and disease management are described in a multidisciplinary way. In particular the interplay between clinical, radiological and pathological staging, which are usually conducted independently, is discussed. The integrated approach shows that there are both advantages and disadvantages to abandoning the MX category. To avoid ambiguity arising both by applying and interpreting MX category for stage assigning, its abandoning seems reasonable. The recognition of the importance of small lesion characterization raises the need for applying a separate category; therefore a proposal for their categorization is put forward. By using the proposed categorization the lack of consideration for indeterminate visceral lesions with the current staging system will be overcome, also optimizing tailored follow-up.
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Efficacy of fusion imaging combining sonography and hepatobiliary phase MRI with Gd-EOB-DTPA to detect small hepatocellular carcinoma. AJR Am J Roentgenol 2012; 198:106-14. [PMID: 22194485 DOI: 10.2214/ajr.10.6039] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE We evaluated the efficacy of fusion imaging that fuses conventional sonography images with hepatobiliary phase contrast-enhanced MR images obtained with gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid (Gd-EOB-DTPA) as the reference image for the detection of hepatocellular carcinomas (HCCs). SUBJECTS AND METHODS Eighty-seven HCCs with a maximum diameter of between 1 and 3 cm at the time of diagnosis were enrolled in this prospective study. We compared the detection rates of HCCs using three sonography modalities: conventional sonography, late phase of contrast-enhanced sonography with Sonazoid, and fusion imaging combining conventional sonography and the hepatobiliary phase of contrast-enhanced MRI with Gd-EOB-DTPA as the reference image. The comparisons were made using the McNemar test. RESULTS The detection rate of HCCs using fusion imaging (98%, 85/87) was significantly higher than the detection rates using conventional sonography (76%, 66/87) and contrast-enhanced sonography (83%, 72/87) (p<0.01, for both). For small HCCs (maximum diameter, 1-2 cm), the detection rate using fusion imaging (97%, 59/61) was also significantly higher than those using conventional sonography (66%, 40/61) and contrast-enhanced sonography (80%, 49/61) (p<0.01, for both). The detection rate for atypical HCCs was also significantly higher using fusion imaging (95%, 18/19) than using conventional sonography (53%, 10/19) and contrast-enhanced sonography (26%, 5/19) (p<0.01, for both). CONCLUSION Fusion imaging combining conventional sonography and the hepatobiliary phase of contrast-enhanced MRI with Gd-EOB-DTPA is more sensitive than conventional sonography or contrast-enhanced sonography for detecting HCCs, especially small or atypical HCCs.
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Zacchino M, Allegri M, Canepari M, Minella CE, Bettinelli S, Draghi F, Calliada F. Feasibility of pudendal nerve anesthetic block using fusion imaging technique in chronic pelvic pain. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.eujps.2010.09.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Indeterminate focal liver lesions incidentally discovered at gray-scale US: role of contrast-enhanced sonography. Invest Radiol 2011; 46:106-15. [PMID: 20938345 DOI: 10.1097/rli.0b013e3181f44184] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVES to assess the role of contrast-enhanced ultrasound (CEUS) in the characterization of focal liver lesions (FLLs) incidentally discovered but indeterminate at gray-scale ultrasound (US). MATERIALS AND METHODS one hundred forty-two consecutive patients with 174 FLLs (169 benign and 5 malignant) incidentally discovered but indeterminate at gray-scale US, underwent CEUS after the administration of SonoVue. Two readers independently reviewed CEUS scans and: (1) classified each lesion as malignant or benign on a 5-point scale of confidence by means of definite diagnostic criteria; (2) provided if possible a specific diagnosis; (3) were requested if further imaging was needed for lesion characterization. Sensitivity, specificity, and areas under the receiver-operating characteristic curve (Az) as well as interobserver agreement were calculated. RESULTS at CEUS, both readers correctly differentiated benign from malignant lesions in 168 of 174 (96.5%) cases (P < 0.0001). A specific correct diagnosis was provided in 123 of 174 (70.7%) and 127 of 174 (72.9%) cases for reader 1 and 2, respectively (P < 0.0001). A further imaging study to characterize the lesion after CEUS was requested in 67 cases (38.5%) for reader 1 (P < 0.001) and 46 cases (26.4%) for reader 2 (P < 0.001). Receiver-operating characteristic analysis after CEUS revealed Az value of 1 for both readers and sensitivity and specificity values of 100% and 97.04% for reader 1 and 100% and 96.45 for reader 2 respectively (P < 0.0001). Inter-reader agreement at CEUS was good (weighted k = 0.779). CONCLUSION CEUS improves the diagnostic performance of radiologists in the characterization of indeterminate FLLs incidentally discovered at US and reduces the need for further radiologic work-up.
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