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Sinagra L, Orlandi R, Caspanello T, Troisi A, Iannelli NM, Vallesi E, Pettina G, Bargellini P, De Majo M, Boiti C, Cristarella S, Quartuccio M, Polisca A. Contrast-Enhanced Ultrasonography (CEUS) in Imaging of the Reproductive System in Dogs: A Literature Review. Animals (Basel) 2023; 13:ani13101615. [PMID: 37238045 DOI: 10.3390/ani13101615] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/26/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
The use of contrast-enhanced ultrasound (CEUS) has been widely reported for reproductive imaging in humans and animals. This review aims to analyze the utility of CEUS in characterizing canine reproductive physiology and pathologies. In September 2022, a search for articles about CEUS in canine testicles, prostate, uterus, placenta, and mammary glands was conducted on PubMed and Scopus from 1990 to 2022, showing 36 total results. CEUS differentiated testicular abnormalities and neoplastic lesions, but it could not characterize tumors. In prostatic diseases, CEUS in dogs was widely studied in animal models for prostatic cancer treatment. In veterinary medicine, this diagnostic tool could distinguish prostatic adenocarcinomas. In ovaries, CEUS differentiated the follicular phases. In CEH-pyometra syndrome, it showed a different enhancement between endometrium and cysts, and highlighted angiogenesis. CEUS was shown to be safe in pregnant dogs and was able to assess normal and abnormal fetal-maternal blood flow and placental dysfunction. In normal mammary glands, CEUS showed vascularization only in diestrus, with differences between mammary glands. CEUS was not specific for neoplastic versus non-neoplastic masses and for benign tumors, except for complex carcinomas and neoplastic vascularization. Works on CEUS showed its usefulness in a wide spectrum of pathologies of this non-invasive, reliable diagnostic procedure.
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Affiliation(s)
- Letizia Sinagra
- Department of Veterinary Sciences, University of Messina, Viale Palatucci, 13, 98168 Messina, Italy
| | - Riccardo Orlandi
- Anicura Tyrus Clinica Veterinaria, Via Bartocci 1G, 05100 Terni, Italy
| | - Tiziana Caspanello
- Department of Veterinary Sciences, University of Messina, Viale Palatucci, 13, 98168 Messina, Italy
| | - Alessandro Troisi
- School of Biosciences and Veterinary Medicine, University of Camerino, Via Circonvallazione 93/95, 62024 Macerata, Italy
| | - Nicola Maria Iannelli
- Department of Veterinary Sciences, University of Messina, Viale Palatucci, 13, 98168 Messina, Italy
- Clinica Veterinaria Camagna-VetPartners, Via Fortunato Licandro 13, 89124 Reggio di Calabria, Italy
| | - Emanuela Vallesi
- Anicura Tyrus Clinica Veterinaria, Via Bartocci 1G, 05100 Terni, Italy
- Anicura CMV Clinica Veterinaria, Via G.B. Aguggiari 162, 21100 Varese, Italy
| | - Giorgia Pettina
- Department of Veterinary Sciences, University of Messina, Viale Palatucci, 13, 98168 Messina, Italy
| | - Paolo Bargellini
- Anicura Tyrus Clinica Veterinaria, Via Bartocci 1G, 05100 Terni, Italy
| | - Massimo De Majo
- Department of Veterinary Sciences, University of Messina, Viale Palatucci, 13, 98168 Messina, Italy
| | - Cristiano Boiti
- Tyrus Science Foundation, Via Bartocci 1G, 05100 Terni, Italy
| | - Santo Cristarella
- Department of Veterinary Sciences, University of Messina, Viale Palatucci, 13, 98168 Messina, Italy
| | - Marco Quartuccio
- Department of Veterinary Sciences, University of Messina, Viale Palatucci, 13, 98168 Messina, Italy
| | - Angela Polisca
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo 4, 06126 Perugia, Italy
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Liu RQ, Liu JB, Duan SB, Cheng SG, Chang ZY, Cao HC, Cao GS, Li YQ, Li N, Zhang LZ. Dynamic prostatic and laser-ablated lesion volume change after transperineal laser ablation in canine: preliminary observation and its clinical significance. Int J Hyperthermia 2020; 37:1260-1267. [PMID: 33191810 DOI: 10.1080/02656736.2020.1842517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
AIM The purpose of this study is to observe the volume change of prostate and laser-ablated lesions in the canine and to explore the mechanism and clinical significance through histopathology. MATERIALS AND METHODS Transperineal laser ablation (TPLA) was performed under the guidance of transrectal ultrasound (TRUS) in eight canines. Two canines were sacrificed 1 day and 1 week after TPLA, respectively. The remaining six canines were sacrificed after finishing transrectal contrast-enhanced ultrasound (TR-CEUS) at three phases. RESULTS The prostatic volumes immediately following TPLA and 1 week later were larger than before TPLA (20.1 ± 3.9 vs 17.1 ± 3.8 ml; 21.7 ± 3.6 vs 17.1 ± 3.8 ml, p < 0.05), but 1 month later, returned to the preoperative level (17.4 ± 3.2 ml). At three time points, the mean volumes of laser-ablated lesions at 3 W/600 J were 0.6 ± 0.2, 1.1 ± 0.4, and 1.7 ± 0.5 ml, respectively, while those of laser-ablated lesions at 3 W/1200 J were 1.2 ± 0.2, 1.6 ± 0.3, and 2.2 ± 0.5 ml, respectively. The mean volumes of laser-ablated lesions increased significantly over time after TPLA (p < 0.050). CONCLUSION The prostate volume transient enlarges after TPLA, which prompts for clinical application that it should prolong appropriately the duration of urinary catheterization to avoid acute urinary retention. Many inflammatory cells were observed in the laser-ablated lesions and adjacent normal prostate parenchyma through histopathology. It is speculated that the inflammatory response is involved in the progression of tissue damage.
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Affiliation(s)
- Rui-Qing Liu
- Department of Interventional Therapy, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou City, China.,Henan Engineering Technology Research Center of Ultrasonic Molecular Imaging and Nanotechnology, Zhengzhou City, China
| | - Ji-Bin Liu
- Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, PA, USA
| | - Shao-Bo Duan
- Henan Engineering Technology Research Center of Ultrasonic Molecular Imaging and Nanotechnology, Zhengzhou City, China.,Department of Ultrasound, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou City, China
| | - Si-Guo Cheng
- Department of Urology, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou City, China
| | - Zhi-Yang Chang
- Henan Engineering Technology Research Center of Ultrasonic Molecular Imaging and Nanotechnology, Zhengzhou City, China.,Department of Ultrasound, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou City, China
| | - Hui-Cun Cao
- Department of Interventional Therapy, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou City, China
| | - Guang-Shao Cao
- Department of Interventional Therapy, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou City, China
| | - Ya-Qiong Li
- Henan Engineering Technology Research Center of Ultrasonic Molecular Imaging and Nanotechnology, Zhengzhou City, China.,Department of Pharmacy, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou City, China
| | - Na Li
- Henan Engineering Technology Research Center of Ultrasonic Molecular Imaging and Nanotechnology, Zhengzhou City, China.,Department of Ultrasound, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou City, China
| | - Lian-Zhong Zhang
- Henan Engineering Technology Research Center of Ultrasonic Molecular Imaging and Nanotechnology, Zhengzhou City, China.,Department of Ultrasound, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou City, China
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3
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Liu R, Duan S, Cao H, Cao G, Chang Z, Zhang Y, Li Y, Wu Y, Liu L, Zhang L. A pilot study of the shapes of ablation lesions in the canine prostate by laser, radiofrequency and microwave and their clinical significance. PLoS One 2020; 15:e0223229. [PMID: 32271751 PMCID: PMC7145095 DOI: 10.1371/journal.pone.0223229] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 03/19/2020] [Indexed: 12/15/2022] Open
Abstract
To explore the shape characteristics of ablation lesions created via laser ablation (LA), radiofrequency ablation (RFA) and microwave ablation (MWA) in canine prostates and the clinical significance of these characteristics, six adult male beagles were randomly assigned to the LA, RFA, and MWA groups. These ablations were performed with common parameters applied in clinical practice (LA, 3 W/1200 J; RFA and MWA, 30 W/120 s). One ablation lesion was created in each lobe of the prostate via the ablation technique, resulting in a total of twelve ablation lesions. Transrectal ultrasound (TRUS) was used as guidance during puncture and to monitor changes in the ablation lesions. Finally, the ablation efficacy was assessed using transrectal contrast-enhanced ultrasonography (CEUS), and the transverse diameter (TRD), anteroposterior diameter (APD) and longitudinal diameter (LD) of each ablation lesion were measured. The volume (V) and the ratio (R) value were calculated. R reflects the shape characteristic of the ablation lesion (the R value close to 1.0 indicates a more spherical shape). The R values of the ablation lesions were 0.89 ± 0.02, 0.72 ± 0.01, and 0.65 ± 0.03 for RFA, MWA and LA, respectively, and they were significantly different (P = 0.027). The volumes of the ablation lesions were 2.17 ± 0.10 ml, 1.51 ± 0.20 ml, and 0.79 ± 0.07 ml for MWA, LA and RFA, respectively, and they were also significantly different (P = 0.001). The three abovementioned thermal ablation techniques with common parameters in clinical practice can be used for ablation in the prostate. The shapes and volumes of the ablation lesions of the three techniques were varied: The RFA-created lesions had the lowest volumes and were more spherical in shape, demonstrating that RFA could be used for the treatment of relatively small lesions or tumours adjacent to vital organs. The MWA lesions had the largest size with a spherical shape, which could be advantageous for the ablation of tumours with relatively large sizes. The sizes of the ablation lesions created via LA were between those of RFA and MWA but presented more oval in shape, suggesting that this method is highly appropriate for the ablation of benign prostatic hyperplasia (BPH).
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Affiliation(s)
- Ruiqing Liu
- Department of Interventional Therapy, People’s Hospital of Zhengzhou University, Henan Provincial People’s Hospital, Zhengzhou, Henan, China
- Ultrasonic Multimodal Molecular Imaging Laboratory, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Henan University People’s Hospital, Zhengzhou, Henan, China
| | - Shaobo Duan
- Ultrasonic Multimodal Molecular Imaging Laboratory, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Henan University People’s Hospital, Zhengzhou, Henan, China
| | - Huicun Cao
- Department of Interventional Therapy, People’s Hospital of Zhengzhou University, Henan Provincial People’s Hospital, Zhengzhou, Henan, China
| | - Guangshao Cao
- Department of Interventional Therapy, People’s Hospital of Zhengzhou University, Henan Provincial People’s Hospital, Zhengzhou, Henan, China
| | - Zhiyang Chang
- Ultrasonic Multimodal Molecular Imaging Laboratory, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Henan University People’s Hospital, Zhengzhou, Henan, China
| | - Ye Zhang
- Ultrasonic Multimodal Molecular Imaging Laboratory, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Henan University People’s Hospital, Zhengzhou, Henan, China
| | - Yaqiong Li
- Ultrasonic Multimodal Molecular Imaging Laboratory, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Henan University People’s Hospital, Zhengzhou, Henan, China
| | - Yuejin Wu
- Ultrasonic Multimodal Molecular Imaging Laboratory, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Henan University People’s Hospital, Zhengzhou, Henan, China
- Department of Ultrasound, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Henan University People’s Hospital, Zhengzhou, Henan, China
| | - Luwen Liu
- Ultrasonic Multimodal Molecular Imaging Laboratory, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Henan University People’s Hospital, Zhengzhou, Henan, China
- Department of Ultrasound, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Henan University People’s Hospital, Zhengzhou, Henan, China
| | - Lianzhong Zhang
- Ultrasonic Multimodal Molecular Imaging Laboratory, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Henan University People’s Hospital, Zhengzhou, Henan, China
- Department of Ultrasound, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Henan University People’s Hospital, Zhengzhou, Henan, China
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de Castro Abreu AL, Ashrafi AN, Gill IS, Oishi M, Winter MW, Park D, Duddalwar V, Stern MC, Palmer SL, Aron M, Gulati M. Contrast-Enhanced Transrectal Ultrasound for Follow-up After Focal HIFU Ablation for Prostate Cancer. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2019; 38:811-819. [PMID: 30117172 PMCID: PMC9721530 DOI: 10.1002/jum.14765] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 06/05/2018] [Accepted: 06/30/2018] [Indexed: 06/08/2023]
Abstract
The optimal strategy for imaging after focal therapy for prostate cancer is evolving. This series is an initial report on the use of contrast-enhanced transrectal ultrasound (TRUS) in follow-up of patients after high-intensity focused ultrasound (HIFU) hemiablation for prostate cancer. In 7 patients who underwent HIFU hemiablation, contrast-enhanced TRUS findings were as follows: (1) contrast-enhanced TRUS clearly showed the HIFU ablation defect as a sharply marginated nonenhancing zone in all patients; (2) contrast-enhanced TRUS identified suspicious foci of recurrent enhancement within the ablation zone in 2 patients, facilitating image-guided prostate biopsy, which showed prostate cancer; and (3) contrast-enhanced TRUS findings correlated with multiparametric magnetic resonance imaging and biopsy histologic findings.
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Affiliation(s)
| | - Akbar N Ashrafi
- USC Institute of Urology, University of Southern California, Los Angeles, California, USA
| | - Inderbir S Gill
- USC Institute of Urology, University of Southern California, Los Angeles, California, USA
| | - Masakatsu Oishi
- USC Institute of Urology, University of Southern California, Los Angeles, California, USA
| | - Matthew W Winter
- USC Institute of Urology, University of Southern California, Los Angeles, California, USA
| | - Daniel Park
- USC Institute of Urology, University of Southern California, Los Angeles, California, USA
| | - Vinay Duddalwar
- Department of Radiology, University of Southern California, Los Angeles, California, USA
| | - Mariana C Stern
- USC Institute of Urology, University of Southern California, Los Angeles, California, USA
- Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Suzanne L Palmer
- Department of Radiology, University of Southern California, Los Angeles, California, USA
| | - Manju Aron
- Department of Pathology, University of Southern California, Los Angeles, California, USA
| | - Mittul Gulati
- Department of Radiology, University of Southern California, Los Angeles, California, USA
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Ashrafi AN, Nassiri N, Gill IS, Gulati M, Park D, de Castro Abreu AL. Contrast-Enhanced Transrectal Ultrasound in Focal Therapy for Prostate Cancer. Curr Urol Rep 2018; 19:87. [PMID: 30155585 PMCID: PMC9084632 DOI: 10.1007/s11934-018-0836-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
PURPOSE OF REVIEW Contrast-enhanced transrectal ultrasound (CeTRUS) is an emerging imaging technique in prostate cancer (PCa) diagnosis and treatment. We review the utility and implications of CeTRUS in PCa focal therapy (FT). RECENT FINDINGS CeTRUS utilizes intravenous injection of ultrasound-enhancing agents followed by high-resolution ultrasound to evaluate tissue microvasculature and differentiate between benign tissue and PCa, with the latter demonstrating increased enhancement. The potential utility of CeTRUS in FT for PCa extends to pre-, intra- and post-operative settings. CeTRUS may detect PCa, facilitate targeted biopsy and aid surgical planning prior to FT. During FT, the treated area can be visualized as a well-demarcated non-enhancing zone and continuous real-time assessment allows immediate re-treatment if necessary. Following FT, the changes on CeTRUS are immediate and consistent, thus facilitating repeat imaging for comparison during follow-up. Areas suspicious for recurrence may be detected and target-biopsied. Enhancement can be quantified using time-intensity curves allowing objective assessment and comparison. Based on encouraging early outcomes, CeTRUS may become an alternative imaging modality in prostate cancer FT. Further study with larger cohorts and longer follow-up are needed.
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Affiliation(s)
- Akbar N Ashrafi
- USC Institute of Urology, Keck School of Medicine, University of Southern California, 1441 Eastlake Ave, Suite 7416, Los Angeles, CA, 90089, USA
| | - Nima Nassiri
- USC Institute of Urology, Keck School of Medicine, University of Southern California, 1441 Eastlake Ave, Suite 7416, Los Angeles, CA, 90089, USA
| | - Inderbir S Gill
- USC Institute of Urology, Keck School of Medicine, University of Southern California, 1441 Eastlake Ave, Suite 7416, Los Angeles, CA, 90089, USA
| | - Mittul Gulati
- Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Daniel Park
- USC Institute of Urology, Keck School of Medicine, University of Southern California, 1441 Eastlake Ave, Suite 7416, Los Angeles, CA, 90089, USA
| | - Andre L de Castro Abreu
- USC Institute of Urology, Keck School of Medicine, University of Southern California, 1441 Eastlake Ave, Suite 7416, Los Angeles, CA, 90089, USA.
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Liu J, Liu Y, Huang J, Huang L, Zhao P. Real-time Monitoring of Contrast-enhanced Ultrasound for Radio Frequency Ablation. Open Med (Wars) 2017; 12:474-480. [PMID: 29318194 PMCID: PMC5757354 DOI: 10.1515/med-2017-0066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 11/17/2017] [Indexed: 12/15/2022] Open
Abstract
Background This study compared the realtime monitoring effects of conventional ultrasound and contrast-enhanced ultrasound (CEUS) on evaluating radio frequency ablation (RFA) in a living swine liver model. Methodology Liver RFA was performed on 10
young swine. Conventional ultrasound and CEUS were performed immediately. After the animals were sacrificed, ablation lesions were removed to histopathologically examine the range of the lesions. Ablation completeness based on three methods were compared using histopathology as the gold standard. Results Forty-three ablation lesions were produced in the animals. The horizontal diameter, vertical diameter and ablation lesion area based on conventional ultrasound were all significantly smaller than those based on the gross sample, but no significant differences existed between the results of the CEUS and the gross sample. Histopathology showed that 30 lesions were incompletely ablated and 13 were completely ablated, while CEUS showed that 28 lesions were incompletely ablated and 15 were completely ablated. Compared with histopathology, CEUS had an accuracy of 81.4%, a sensitivity of 83.3%, and a specificity of 76.9%. No significant difference in ablation completeness judgment between CEUS and histopathology was observed. Conclusion CEUS provides a real-time radiological foundation for evaluating RFA lesion ranges and completeness in a living swine liver model.
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Affiliation(s)
- Jiangwei Liu
- Department of Hepatobiliary Surgery, Guizhou Provincial People's Hospital, Guizhou550002, China
| | - Yan Liu
- Department of Hepatobiliary Surgery, Guizhou Provincial People's Hospital, Guizhou550002, China
| | - Jianzhao Huang
- Department of Hepatobiliary Surgery, Guizhou Provincial People's Hospital, Guizhou550002, China
| | - Lei Huang
- Department of Hepatobiliary Surgery, Guizhou Provincial People's Hospital, Guizhou550002, China
| | - Pengwei Zhao
- Department of Hepatobiliary Surgery, Guizhou Provincial People's Hospital, Guizhou550002, China
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Atri M, Gertner MR, Haider MA, Weersink RA, Trachtenberg J. Contrast-enhanced ultrasonography for real-time monitoring of interstitial laser thermal therapy in the focal treatment of prostate cancer. Can Urol Assoc J 2011; 3:125-30. [PMID: 19424466 DOI: 10.5489/cuaj.1044] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
INTRODUCTION We report a case study of the application of contrast-enhanced ultrasonography (CEUS) for intraoperative monitoring of thermal ablation of a single focus of prostate cancer. METHODS A patient presented with biopsy-proven, solitary-focus, low-risk prostate cancer and was recruited into a clinical trial of interstitial laser thermal focal therapy. Multiparametric magnetic resonance imaging (MRI) was used to locate the single dominant focus, and photothermal ablation was performed at the tumour site under the guidance of transrectal ultrasonography. Transrectal CEUS using systemic bolus injections of the intravascular contrast agent Definity was performed immediately before, several times during and on completion of therapy. Lesions observed on CEUS were compared with treatment effect as measured by tissue devascularization on 1-week gadolinium (Gd)-enhanced MRI. RESULTS Baseline images showed CEUS contrast-agent signal throughout the prostate. During and after treatment, large hypocontrast regions were observed surrounding the treatment fibres, indicating the presence of an avascular lesion resulting from photothermal therapy. Lesion size was found to increase during the delivery of thermal energy. Lesion size measured using CEUS (16 x 11 mm) was similar to the 7-day lesion measured using Gd-enhanced T(1)-weighted MRI. CONCLUSION Focal therapy for prostate cancer requires both complete treatment of the dominant tumour focus and minimal morbidity. The application of CEUS during therapy appears to provide an excellent measure of the actual treatment effect. Hence, it can be used to ensure that the therapy encompasses the whole target but does not extend to surrounding critical structures. Future clinical studies are planned with comparisons of intraoperative CEUS to Gd-enhanced MRI at 7 days and whole-mount pathology samples.
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Affiliation(s)
- Mostafa Atri
- Department of Medical Imaging, University Health Network and Mount Sinai Hospital, Toronto, Ont., the
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Lindner U, Weersink R, Haider M, Gertner M, Davidson S, Atri M, Wilson B, Fenster A, Trachtenberg J. Image Guided Photothermal Focal Therapy for Localized Prostate Cancer: Phase I Trial. J Urol 2009; 182:1371-7. [PMID: 19683262 DOI: 10.1016/j.juro.2009.06.035] [Citation(s) in RCA: 154] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2009] [Indexed: 10/20/2022]
Affiliation(s)
- U. Lindner
- Surgical Oncology, Urology Division, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - R.A. Weersink
- Division of Biophysics and Bioimaging, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - M.A. Haider
- Joint Department of Medical Imaging, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - M.R. Gertner
- Division of Biophysics and Bioimaging, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - S.R.H. Davidson
- Division of Biophysics and Bioimaging, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - M. Atri
- Joint Department of Medical Imaging, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - B.C. Wilson
- Division of Biophysics and Bioimaging, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - A. Fenster
- Imaging Research Laboratories, Robarts Research Institute, London, Ontario, Canada
| | - J. Trachtenberg
- Surgical Oncology, Urology Division, University Health Network, University of Toronto, Toronto, Ontario, Canada
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Cheng HLM, Haider MA, Dill-Macky MJ, Sweet JM, Trachtenberg J, Gertner MR. MRI and contrast-enhanced ultrasound monitoring of prostate microwave focal thermal therapy: An in vivo canine study. J Magn Reson Imaging 2008; 28:136-43. [DOI: 10.1002/jmri.21415] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Liu JB, Wansaicheong G, Merton DA, Chiou SY, Sun Y, Li K, Forsberg F, Edmonds PR, Needleman L, Halpern EJ. Canine prostate: contrast-enhanced US-guided radiofrequency ablation with urethral and neurovascular cooling--initial experience. Radiology 2008; 247:717-25. [PMID: 18413888 DOI: 10.1148/radiol.2473071334] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
PURPOSE To prospectively evaluate in a canine model contrast material-enhanced ultrasonography (US) for guiding and monitoring radiofrequency (RF) ablation of the entire prostate, with urethral and vascular cooling to protect the surrounding structures. MATERIALS AND METHODS After approval by the institutional animal use and care committee, an RF electrode was used to ablate the entire prostate in 15 dogs. During ablation, pulse-inversion harmonic US was performed by using an endocavitary probe after an intravenous bolus injection (0.04 mL/kg) and infusion (0.015 muL/kg/min) of a US contrast agent. In group 1 (n = 4), no cooling protection was used during ablation. In group 2 (n = 5), urethral and bladder protection was provided by inserting a 12-F catheter infused with cold saline (8 degrees C +/- 4 [standard deviation]) at a rate of 100 mL/min. In group 3 (n = 6), further protection of the neurovascular bundles (NVBs) was provided by infusing cold saline (8 degrees C +/- 4) into the iliac arteries at a rate of 50 mL/min by means of catheterization of the femoral artery. Pathologic findings among the three groups were compared by using the Wilcoxon rank sum test. RESULTS The average volumes of prostate ablation achieved in the three groups were 96.6%, 91.9%, and 92%. Contrast-enhanced pulse-inversion harmonic US allowed visualization and monitoring of urethral and NVB blood flow during the ablation. Without protection, damage to the urethra and the NVB was demonstrated at both US and pathologic examination. There was highly significant difference in urethral damage between groups with and the group without urethral cooling (P = .002), while intraarterial cooling demonstrated a nonsignificant trend toward a decreased NVB damage (P = .069). CONCLUSION Contrast-enhanced US can guide RF ablation of the entire prostate. Infusion of cold saline provides effective protection for the urethra during such procedures. The application of intraarterial cooling did not provide a significant improvement in the protection of the NVB in this small study.
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Affiliation(s)
- Ji-Bin Liu
- Department of Radiology, Thomas Jefferson University, 7th Floor Main Building, 132 S 10th St, Philadelphia, PA 19107, USA.
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Chiou SY, Liu JB, Needleman L. Current status of sonographically guided radiofrequency ablation techniques. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2007; 26:487-99. [PMID: 17384046 DOI: 10.7863/jum.2007.26.4.487] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
OBJECTIVE The purpose of this article was to review the current clinical applications of sonographically guided radiofrequency ablation (RFA) techniques. METHODS Publications regarding RFA extracted from a computerized database (MEDLINE) and from references cited in these articles were reviewed to evaluate the clinical effect and patient outcome. RESULTS Radiofrequency ablation has shown some promising effects in the treatment of tumors in various parts of the body. The recent advances in RFA technology enable larger volumes of treatment and make RFA clinically practical. It is most often used for hepatic and renal tumors, and applications for other organs and structures are increasing and rapidly developing. Sonography provides a convenient way to guide and monitor the procedure in most situations. CONCLUSIONS Effectiveness of RFA in the treatment of tumors in various body parts has been achieved. Radiofrequency ablation should be considered as an alternative or complementary method in the integration of oncologic management to obtain the greatest benefit to patients.
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Affiliation(s)
- See-Ying Chiou
- Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan
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