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Journal of Medical Ultrasonics

Hiroshi Isono, Shinnosuke Hirata, Tadashi Yamaguchi, Hiroyuki Hachiya
PURPOSE: Chronic liver disease requires careful follow-up during long-term treatment, and development of a quantitative diagnosis method for liver fibrosis based on an ultrasonic imaging system is highly desired. METHODS: Texture analysis using a co-occurrence matrix was applied to both clinical and simulated ultrasonic images of fibrotic livers. A sequence of matrices was generated for pixel-pair distance, r, and texture feature contrast was chosen to examine the response to r in combination with statistical analysis of echo amplitude distribution using a multi-Rayleigh model...
October 18, 2016: Journal of Medical Ultrasonics
Yuta Hagiwara, Tomohide Yoshie, Takahiro Shimizu, Hana Ogura, Takayuki Fukano, Tatsuro Takada, Toshihiro Ueda, Yasuhiro Hasegawa
Contrast-enhanced transoral carotid ultrasonography (CETOCU) is a novel examination modality that is superior to other modalities in the cases of pseudo-occlusion with severe arteriosclerotic stenosis of the distal internal carotid artery (ICA), and is also useful for noninvasively evaluating changes over time in the vessel distal to the stent following carotid artery stenting (CAS). We report a case of a patient who we evaluated with CETOCU for a pseudo-occlusive ICA before and after CAS.
October 11, 2016: Journal of Medical Ultrasonics
Koji Morita, Takahiko Sakamoto, Shuji Ota, Hideo Masugi, Ikumi Chikuta, Yamato Mashimo, Naoki Edo, Takuo Tokairin, Nobuhiko Seki, Toshio Ishikawa
It has been shown that metastases to the thyroid from extrathyroidal malignancies occur as solitary or multiple nodules, or may involve the whole thyroid gland diffusely. However, diffuse metastasis of gastric cancer to the thyroid is extremely rare. Here, we report a case of a 74-year-old woman with diffuse infiltration of gastric adenocarcinoma (signet-ring-cell carcinoma/poorly differentiated adenocarcinoma) cells in the thyroid. The pathological diagnosis was made based on upper gastrointestinal endoscopy with biopsy and fine-needle aspiration cytology of the thyroid...
October 1, 2016: Journal of Medical Ultrasonics
Weijia Lu, Bruno Haider
BACKGROUND AND PURPOSE: The twinkling sign in B-flow imaging (BFI-TS) has been reported in the literature to increase both specificity and sensitivity compared to the traditional gray-scale imaging. Unfortunately, there has been no conclusive study on the mechanism of this effect. METHODS: In the study presented here, a comparative test on phantoms is introduced, where the variance of a phase estimator is used to quantify the motion amplitude. The statistical inference is employed later to find the dominate factor for the twinkling sign, which is proven by computer simulation...
September 29, 2016: Journal of Medical Ultrasonics
Abhinav Aggarwal, Aakriti Kapoor Aggarwal, Aakaar Kapoor, Ravi Kapoor, Ashutosh Bansal
Dyke-Davidoff-Masson syndrome (DDMS) is an uncommon congenital/pediatric disorder diagnosed only with the help of imaging. Clinical features associated with it are hemiparesis, seizures, facial asymmetry, and mental retardation. We here present a case of DDMS diagnosed antenatally at 29 weeks gestational age during routine antenatal ultrasound examination. The patient was further evaluated and followed using both ultrasound and magnetic resonance imaging during antenatal and postnatal periods. The infant had unilateral hemiatrophy with the absence of anterior and middle cerebral arteries...
September 28, 2016: Journal of Medical Ultrasonics
Tanyaporn Chantarojanasiri, Yoshiki Hirooka, Hiroki Kawashima, Eizaburo Ohno, Pradermchai Kongkam, Hidemi Goto
Endoscopic ultrasound (EUS) has recently played an increasing role in the diagnosis of gallbladder diseases. This review aims to summarize the role of EUS in the diagnosis of gallbladder lesions. EUS provides high-resolution images that can improve the diagnosis of gallbladder polypoid lesions and microlithiasis, in addition to evaluating gallbladder thickness and staging of gallbladder carcinoma. Contrast-enhancing agents may be useful for the differential diagnosis of gallbladder lesions, but the evidence of their effectiveness is still limited and further studies are required in this area to establish its usefulness...
September 12, 2016: Journal of Medical Ultrasonics
Mengyun Yao, Qiuyan Zhang, Jing Wang, Feixiang Xiang, Cheng Yu, Qing Lv, Mingxing Xie, Yanrong Zhang
A case of congenital renal arteriovenous fistula (AVF) complicating pregnancy with gross hematuria was managed successfully by superselective embolization with metallic coils. The patient was in the first trimester of her pregnancy at 12 weeks of gestation. The AVF was detected by color Doppler sonography and confirmed by renal arteriography. Because of its easy accessibility and absence of irradiation, ultrasound is the first choice for pregnant patients. Color Doppler ultrasound is effective in diagnosing AVF, and it is also helpful in the long-term followup after treatment...
September 9, 2016: Journal of Medical Ultrasonics
Hiroyasu Morikawa, Shin Toyota, Kenji Wada, Sawako Uchida-Kobayashi, Norifumi Kawada, Hiromichi Horinaka
PURPOSE: Indocyanine green (ICG) accumulation in hepatocellular carcinoma means tumors can be located by fluorescence. However, because of light scattering, it is difficult to detect ICG fluorescence from outside the body. We propose a new fluorescence imaging method that detects changes in the intensity of ICG fluorescence by ultrasound-induced temperature changes. METHODS: ICG fluorescence intensity decreases as the temperature rises. Therefore, it should theoretically be possible to detect tissue distribution of ICG using ultrasound to heat tissue, moving the point of ultrasound transmission, and monitoring changes in fluorescence intensity...
August 26, 2016: Journal of Medical Ultrasonics
Hiroko Naganuma, Hideaki Ishida, Masahiro Ogawa, Yukinobu Watanabe, Daisuke Watanabe, Yoko Ohyama, Takako Watanabe
PURPOSE: Contrast-enhanced ultrasound (CEUS) is a very sensitive diagnostic tool in characterizing liver tumors. It is especially useful in the diagnosis of focal nodular hyperplasia (FNH) of the liver. According to the previous reports, FNH is common in young women, and it is usually diagnosed by MRI. The majority of the previous reports come from European countries, and a very few studies of large series designed to describe the clinical features in Japanese patients have been reported...
August 22, 2016: Journal of Medical Ultrasonics
Hua Xin, Hai-Yang Hu, Bin Liu, Xiang Liu, Xia Li, Jie Li
PURPOSE: The aim of this study was to compare the elasticity of the median nerve (MN) between hemodialysis (HD) patients without carpal tunnel syndrome (CTS) and with CTS, and to evaluate the diagnostic usefulness of the elasticity of the MN in HD-CTS. MATERIALS AND METHODS: The MN in 22 HD patients without CTS and 49 HD-CTS patients was studied. The cross-sectional area (CSA) and the elasticity of the MN, which was measured as the subcutaneous fat/median nerve (SF/MN) strain ratio, were evaluated...
August 3, 2016: Journal of Medical Ultrasonics
(no author information available yet)
No abstract text is available yet for this article.
October 2016: Journal of Medical Ultrasonics
Hiroshi Kanai
No abstract text is available yet for this article.
October 2016: Journal of Medical Ultrasonics
Shoichi Matsutani
No abstract text is available yet for this article.
October 2016: Journal of Medical Ultrasonics
Ruby Matsumoto, Kazushi Numata, Nobutaka Doba, Koji Hara, Makoto Chuma, Hiroyuki Fukuda, Akito Nozaki, Katsuaki Tanaka, Yoshimi Ishii, Shin Maeda
Patients receiving methotrexate (MTX) for the treatment of autoimmune disease are at a high risk of developing lymphoproliferative disorders (LPD), the so-called methotrexate-associated lymphoproliferative disorders (MTX-LPD). We recently performed abdominal ultrasonography (US) in a patient with rheumatoid arthritis (RA) who had developed hepatic dysfunction during the course of MTX therapy; the examination revealed multiple well-demarcated hepatic tumors with slightly irregular borders, the largest one measuring 9 cm in diameter...
October 2016: Journal of Medical Ultrasonics
Maiko Kuroda, Masashi Amano, Soichiro Enomoto, Makoto Miyake, Hirokazu Kondo, Toshihiro Tamura, Kazuaki Kaitani, Chisato Izumi, Yoshihisa Nakagawa
Pericardiocentesis is performed to treat cardiac tamponade or diagnose the cause of pericardial effusion. Cardiogenic shock with right ventricular (RV) dysfunction is a rare complication after pericardiocentesis. We report a case of an 82-year-old man who suddenly suffered cardiopulmonary arrest 12 h after pericardiocentesis. A transthoracic echocardiogram showed remarkable RV dysfunction and tricuspid valve dysfunction. Tricuspid valve closure was severely impaired, and the tricuspid regurgitation signal showed laminar flow with an early peak...
October 2016: Journal of Medical Ultrasonics
Kiattisak Kongwattanakul, Piyamas Saksiriwuttho, Ratana Komwilaisak, Pisake Lumbiganon
PURPOSE: This study aimed to evaluate the diagnostic properties of transabdominal sonography with the post-void technique for cervical length measurement. METHODS: This study was a prospective cohort study. The inclusion criteria were pregnant women aged 18-40 years with gestational age of 18-23 completed weeks. Transabdominal sonography with vertical bladder depth of less than 5 cm and transvaginal cervical length measurements were carried out by a single experienced sonographer...
October 2016: Journal of Medical Ultrasonics
Huan-Ling Guo, Li-da Chen, Zhu Wang, Yang Huang, Jin-Ya Liu, Quan-Yuan Shan, Xiao-Yan Xie, Ming-de Lu, Wei Wang
Solitary neurofibroma located in the hilum of the liver is extremely rare, particularly without neurofibromatosis. We herein report a case of hilar biliary neurofibroma without signs of von Recklinghausen's disease. A 36-year-old man was admitted to our department with progressive jaundice. The case was diagnosed as hilar cholangiocarcinoma based on preoperative imaging. The patient consequently received a Roux-en-Y hepaticojejunostomy and was confirmed with neurofibroma pathologically. This is the first reported imaging finding of hilar biliary neurofibroma using contrast-enhanced ultrasound, emphasizing the differential diagnosis of biliary tumors...
October 2016: Journal of Medical Ultrasonics
Noriya Takayama, Yasunao Ishiguro, Nobuyuki Taniguchi, Kazuki Akai, Hideki Sasanuma, Yoshikazu Yasuda, Naotaka Nitta, Iwaki Akiyama
PURPOSE: Acoustic radiation force (ARF) elastography has recently become available. The previous animal studies have revealed lung injuries induced by diagnostic ultrasound, but the effects on the lung resulting from exposure to ultrasound with ARF are unknown. This study aimed to assess the risk of lung injury associated with ultrasound with ARF. METHODS: A focused 2.5-MHz transducer that emits ultrasound with ARF was used. A rabbit was anesthetized, and the transducer was placed in the right subcostal region...
October 2016: Journal of Medical Ultrasonics
Toshimitsu Tsugu, Yuji Nagatomo, Yoshitake Yamada, Keitaro Mahara, Hiroshi Miura, Mitsushige Murata
Löffler endocarditis is a serious complication of idiopathic hypereosinophilic syndrome characterized by a peculiar type of fibrosing endocarditis. It results in heart failure due to restrictive cardiomyopathy and systemic embolism due to intracardiac thrombus. Here we present a case of a 57-year-old man with Löffler endocarditis concomitant with eosinophilic granulomatosis with polyangiitis. A thrombus in the left ventricular apex was noted on transthoracic echocardiography performed as a screening of left ventricular dilatation, which seemed to be a typical finding of Löffler endocarditis...
October 2016: Journal of Medical Ultrasonics
Takashi Mitsui, Hisashi Masuyama, Jota Maki, Shoko Tamada, Yumika Hirano, Eriko Eto, Etsuko Nobumoto, Kei Hayata, Yuji Hiramatsu
PURPOSE: We continuously measured bilateral uterine artery (UA) blood flow and compared differences in UA blood flow to investigate the differences in pathophysiology between early- and late-onset pregnancy-induced hypertension (PIH) and the usefulness of continuous monitoring of UA blood flow for the prediction of early-onset PIH. METHODS: The subjects were 76 PIH patients. The mean pulsatility index of bilateral UA (UAPI), an early diastolic notch in the velocity waveform, and regression curves were retrospectively examined and compared between early- and late-onset groups and the groups with and without fetal growth restriction (FGR)...
October 2016: Journal of Medical Ultrasonics
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