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Journal of Medical Ultrasonics

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https://www.readbyqxmd.com/read/30443690/ultrasonic-measurement-of-sound-velocity-fluctuations-in-biological-tissue-due-to-ultrasonic-heating-and-estimation-of-thermo-physical-properties
#1
Yukako Tsujimoto, Mai Morimoto, Naotaka Nitta, Iwaki Akiyama
PURPOSE: Tissue characterization in terms of the differences in thermo-physical properties of biological tissues was investigated in this study. The objective was to measure the ratio of variation in sound velocity due to ultrasonic heating and to derive the relational expression between the ratio and thermo-physical properties. METHODS: The ratio of sound velocity variation before and after the temperature rise of tissue samples exposed to ultrasound was measured by ultrasonic pulse echo method...
November 15, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30430292/estimation-method-for-sound-velocity-distribution-for-high-resolution-ultrasonic-tomographic-imaging
#2
Keiichiro Abe, Mototaka Arakawa, Hiroshi Kanai
PURPOSE: With commercial ultrasonic equipment, the sound velocity is fixed to a constant value of 1530 or 1540 m/s, which is used for beam formation. However, the assumption of a constant sound velocity is not optimal, as the sound velocity in a living body is heterogeneous. In this study, a novel method was proposed to estimate the distribution of the sound velocity in a region of interest. METHODS: The sound velocity distribution was estimated by fitting the theoretical propagation time of the ultrasonic wave from the scatterer to each of the probe elements with measured values...
November 15, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30361789/evaluation-of-pelvic-floor-muscle-by-transperineal-elastography-in-patients-with-deep-infiltrating-endometriosis-preliminary-observation
#3
Meng Xie, Yu Feng, Xuyin Zhang, Keqin Hua, Yunyun Ren, Wenping Wang
PURPOSE: To assess the elasticity of the pelvic floor muscle (PFM) affected by deep infiltrating endometriosis (DIE) with transperineal elastography. METHODS: This prospective observational study included 88 patients who were diagnosed with DIE, ovarian endometrioid cyst, or ovarian teratoma. All the patients were assigned to one of the three groups and underwent transperineal elastography. The scoring system and strain ratio (SR) values were recorded and analyzed...
October 25, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30353443/high-intensity-focused-ultrasound-ablation-a-non-surgical-approach-to-treat-advanced-and-complicated-liver-alveococcosis
#4
Nurlan Zhampeissov, Erlan Manap, Kulsara Rustemova, Galina Fedotovskikh, Turlybek Tuganbekov, Suindyk Imankulov, Abduzhappar Gaipov
Liver alveococcosis is a life-threatening parasitic disease with progressive growth and wide metastasis to neighboring tissues, lungs, and brain. The radical treatment option is surgery along with a few chemical therapies. However, the frequency of progression and recurrence, as well as postoperative complications and mortality, remains very high. The high-intensity focused ultrasound (HIFU) treatment system, a therapeutic application using ultrasound to deliver heat or agitation into the body, was initially designed to treat cancer...
October 23, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30350247/endothelium-dependent-and-independent-functions-in-migraineurs
#5
LETTER
Ertan Yetkin, Selçuk Öztürk
No abstract text is available yet for this article.
October 22, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30350246/reply-to-endothelium-dependent-and-independent-functions-in-migraineurs
#6
LETTER
Kazumi Fujioka
No abstract text is available yet for this article.
October 22, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30327989/exploration-of-femoral-head-coverage-in-screening-developmental-dysplasia-of-the-hip-in-infants
#7
Wei Fan, Xue-Jiao Li, Hong Gao, Xin Yi, Qiao-Jian Liu
PURPOSE: To investigate the relationship of femoral head coverage (FHC) with Graf's classification for diagnosis of developmental dysplasia of the hip (DDH) and its role in evaluating hip stability. METHODS: A total of 4222 hips were screened ultrasonographically with Graf's and Harcke's methods. The stability of hips was analyzed using the difference between FHCs at neutral and flexion positions (FHC-D). RESULTS: (1) For the non-dislocated hips, the mean value of FHC at the neutral position was 59...
October 16, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30327988/subclinical-crystal-arthropathy-a-silent-contributor-to-inflammation-and-functional-disability-in-knees-with-osteoarthritis-an-ultrasound-study
#8
Reem Hamdy A Mohammed, Hanan Kotb, Marian Amir, Andrea Di Matteo
PURPOSE: This study aimed at investigating the prevalence of crystal deposits with knee osteoarthritis (OA) by ultrasonography and measure the inflammatory burden associated with crystal deposits in OA using WOMAC score. METHODS: Adult patients with primary knee OA diagnosed according to the American College of Rheumatology criteria were included. Participants were subjected to history taking, clinical examination, knee US, and plain radiography. The EULAR and the OMERACT ultrasonography definitions and scanning protocols were used...
October 16, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30311121/comparison-of-hypocrellin-b-mediated-sonodynamic-responsiveness-between-sensitive-and-multidrug-resistant-human-gastric-cancer-cell-lines
#9
Yichen Liu, Hong Bai, Haiping Wang, Xiaobing Wang, Quanhong Liu, Kun Zhang, Pan Wang
OBJECTIVES: The aim of this study was to compare the different responses to hypocrellin B (HB)-mediated sonodynamic treatment between human gastric adenocarcinoma cell line SGC7901 and SGC7901/ADR. METHODS: Tumor cells in culture dishes (35-mm diameter) were exposed to planar ultrasound at an intensity of 0.5 W/cm2 for 60 s combined with/without 2.5 μM HB. Cell viability was determined by MTT and Guava ViaCount assay. Production of reactive oxygen species (ROS) and destabilization of the mitochondrial membrane potential were assessed by flow cytometry...
October 11, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30306440/coil-embolization-of-pseudoaneurysm-as-a-complication-of-excimer-laser-coronary-angioplasty-insights-from-intravascular-ultrasound-and-optical-coherence-tomography-findings
#10
Ruka Yoshida, Kensuke Takagi, Itsuro Morishima, Hideyuki Tsuboi
The occurrence of pseudoaneurysm in the coronary artery is rare and can develop after percutaneous coronary interventions. To date, the optimal therapy, including conservative, surgical, and endovascular therapies, for pseudoaneurysm in the coronary artery remains unclear. Here, we report a case of pseudoaneurysm arising as a complication of excimer laser coronary angioplasty, which was successfully treated with stent-assisted coil embolization, after which optical coherence tomography revealed complete healing of the pseudoaneurysm...
October 10, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30291575/three-dimensional-sonographic-minute-structure-analysis-of-fetal-cerebellar-vermis-development-and-malformations-utilizing-volume-contrast-imaging
#11
Jing-Xian Xie, Jian-Hong You, Xiao-Kang Chen, Yi-Ming Su, Jin-Rong Liu, Shan-Shan Su, Min Hou, Guo-Rong Lv
PURPOSE: To obtain three-dimensional ultrasonic (3D US) structural details and biometrics of the fetal cerebellar vermis and evaluate the value of developmental and malformation identification. METHODS: The 3D US minute structure of the fetal cerebellar vermis in mid-sagittal view was detected in normal fetuses (n = 438; 16-41 weeks). Biometric sizes were measured to establish the stage-specific norms and reproducibility analysis. Additionally, 28 fetuses with suspected abnormal posterior fossa contents were assessed to analyze the clinical value...
October 5, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30291574/virtual-touch-iq-elastography-in-evaluation-of-achilles-tendon-in-patients-with-chronic-renal-failure
#12
Emrah Caglar, Ibrahim Ilker Oz, Serkan Guneyli, Muammer Bilici, Fatih Yılmaz, Sevil Uygun Ilikhan, Ali Borazan
PURPOSE: To evaluate the sonoelastographic changes in the Achilles tendon in patients with chronic renal failure (CRF) using virtual touch imaging quantification (VTIQ) elastography. METHODS: Twenty-six patients undergoing three hemodialysis sessions per week and 26 subjects admitted to our institution between January 2016 and April 2016 were included in this prospective study. The characteristics and body mass index of the patients were noted. Ultrasonography was performed parallel to the long axis of the bilateral Achilles tendons during relaxation of the legs using the Siemens Acuson S3000™ ultrasound device (Siemens HealthCare, Erlangen, Germany)...
October 5, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30288637/ultrasound-evaluation-of-fetal-critical-aortic-stenosis-using-the-left-atrium-area-cardiac-area-ratio-and-the-doppler-patterns-in-the-pulmonary-veins
#13
Sachi Sukegawa, Yuka Yamamoto, Keisuke Sato, Satomi Tanaka, Toshitaka Tanaka, Naoki Mitsuhashi
In fetal critical aortic stenosis (AS), a double reverse pattern in the pulmonary veins (PVs) is associated with a poor prognosis. We evaluated the hemodynamic changes using PV Doppler and the left atrium area/cardiac area (LA/CA) ratio in a fetus at 28 weeks of gestation with critical AS complicated with hydrops fetalis, polyhydramnios, and cardiac abnormality. A markedly enlarged LA and severe mitral regurgitation with critical AS were detected, with LA/CA ratio = 0.40 and double reverse pattern with forward/reverse velocity time integral ratio (FRVR) = 1...
October 4, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30232651/aortic-valve-repair-for-aortic-regurgitation-and-preoperative-echocardiographic-assessment
#14
REVIEW
Takashi Kunihara
Aortic valvuloplasty (AVP) has been performed less frequently than mitral valvuloplasty. The survival benefit of AVP over replacement has been demonstrated. Therefore, standardization of AVP is crucial for its widespread adoption. The hemodynamic advantage of AVP of preserving the native aortic valve may be one reason for the survival benefit. Recent guidelines still recommend AVP in selected cases compared with the less restricted recommendation for mitral valvuloplasty, although recent studies have proposed earlier indication for surgical intervention...
September 19, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30187151/color-doppler-ultrasonography-is-a-reliable-diagnostic-tool-in-the-diagnosis-of-extracranial-vertebral-artery-dissections
#15
Cengiz Yılmaz, Feride Fatma Gorgulu, Fatma Yasemin Oksuzler, Muhammet Arslan, Mahmut Oksuzler, Sakir Ozgur Keskek, Ayse Selcan Koc
The purpose of this study was to evaluate the role of color Doppler sonography (CDS) in the diagnosis of extracranial vertebral artery dissections (EVADs). One hundred and fifty consecutive patients (age range 21-51 years, mean 44 years) with a clinical suspicion of vertebral artery dissection (VAD) were included in this study. All patients underwent CDS of vertebral arteries as the first-line imaging modality. Cervical T1-weighted fat-saturated axial MR images served as the gold standard. Of the 150 patients with a clinical suspicion of VAD, 27 patients were ultimately diagnosed with EVADs based on fat-saturated T1-weighted MR imaging...
September 5, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30167930/ultrasound-scattering-by-aggregated-red-blood-cells-in-patients-with-diabetes
#16
Hiroki Sakaki, Mototaka Arakawa, Satoshi Yashiro, Yusuke Todate, Yasushi Ishigaki, Hiroshi Kanai
PURPOSE: To develop methods for noninvasively and quantitatively measuring blood glucose levels. METHODS: In the present study, we evaluated the degree of red blood cell (RBC) aggregation at a low shear rate robustly by introducing two new parameters determined from changes in the scattering power spectrum of the echoes from the intravascular lumen before and after cessation of blood flow. We also considered the clinical significance of these parameters and the change in sizes estimated by the conventional method by comparing them with the blood glucose level obtained just before the ultrasonic measurements...
August 30, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30155803/association-of-left-ventricular-myocardial-dysfunction-with-diabetic-polyneuropathy
#17
Satoshi Tabako, Masahiko Harada, Kunio Sugiyama, Hiroshi Ohara, Takanori Ikeda
BACKGROUND: The pathogenesis of left ventricular (LV) dysfunction in diabetes has been attracting attention. It has been reported that LV longitudinal systolic myocardial function determined by speckle tracking echocardiography (STE) is associated with diabetic polyneuropathy (DPN). However, the relationship between the severity of peripheral neuropathy and LV myocardial dysfunction is unknown. This study examined the relationship between the severity of DPN and echocardiographic parameters as well as clinical features...
August 28, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30151629/cancer-therapeutics-related-cardiac-dysfunction-in-a-patient-treated-with-abiraterone-for-castration-resistant-prostate-cancer
#18
Toshimitsu Tsugu, Yuji Nagatomo, Yuki Nakajima, Toshimi Kageyama, Yushi Akise, Jin Endo, Yuji Itabashi, Mitsushige Murata, Hideo Mitamura
Abiraterone is an agent effective for castration-resistant prostate cancer, but there have been no reports of cardiotoxic effects inducing cardiomyopathy, to our knowledge. We present a case of an 86-year-old man with castration-resistant prostate cancer treated with abiraterone. He had received an androgen receptor antagonist (bicalutamide) and a gonadotropin-releasing hormone antagonist (degarelix) for 3 years. These agents were changed to enzalutamide due to elevation of plasma prostate-specific antigen level of 129 ng/mL...
August 27, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30269286/editor-s-note
#19
EDITORIAL
Yoshiki Hirooka
No abstract text is available yet for this article.
October 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30269285/let-us-utilize-breast-contrast-enhanced-ultrasound-more
#20
EDITORIAL
Toshikazu Ito
No abstract text is available yet for this article.
October 2018: Journal of Medical Ultrasonics
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