Comparison of conventional ultrasonography and ultrasonography-computed tomography fusion imaging for target identification using digital/real hybrid phantoms: a preliminary study
Conclusion US-CT fusion imaging was superior to US alone in terms of accurate and rapid identification of target lesions. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - February 26, 2016 Category: Radiology Source Type: research

Abdominal ultrasound examination training using an ultrasound phantom and volume navigation system
Abstract Purpose The purpose of this study was to examine the effects of using an ultrasound phantom (ECHOZY) and a volume navigation system (Vnavi) in abdominal ultrasonography training for young residents. Methods Nine third-year residents underwent abdominal ultrasonography training: controls, comprising five residents; and the ECHOZY + Vnavi group, comprising four residents. Residents were trained in abdominal ultrasound examinations using both educational videos and hands-on clinical training. The ECHOZY + Vnavi group also receiv...
Source: Journal of Medical Ultrasonics - February 26, 2016 Category: Radiology Source Type: research

Impact of element pitch on synthetic aperture ultrasound imaging
Discussion and conclusion Even with larger element pitches, good image contrast could be obtained when the number of transmissions was large. This is because echoes from grating lobes are incoherent among transmissions, and they are suppressed by compounding low-resolution images obtained by individual transmissions. On the other hand, an array probe with smaller element pitches achieves good image contrast even with a smaller number of transmissions and, thus, it would be preferable to realize a higher frame rate. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - February 20, 2016 Category: Radiology Source Type: research

Recall criteria for ultrasound breast cancer screening
(Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - February 16, 2016 Category: Radiology Source Type: research

The utility of ultrasound elastography in differentiation of endometriomas and hemorrhagic ovarian cysts
Abstract Purpose To investigate the feasibility of acoustic radiation force impulse imaging in differentiation of endometriomas and hemorrhagic ovarian cysts. Materials and methods We evaluated 84 ovarian cysts with high internal echogenicity diagnosed in 70 consecutive women. We excluded simple cysts and hemorrhagic cysts containing septations or mural nodules with detectable flow on Doppler ultrasonography. We obtained the elastographic shear wave velocity (SWV) value of the cysts that could be endometriomas or hemorrhagic ovarian cysts. ...
Source: Journal of Medical Ultrasonics - February 15, 2016 Category: Radiology Source Type: research

Modified sonourethrography assists urethral catheterization
Abstract Sonourethrography (SUG) is an infrequently used modality to observe the male urethra. We modified SUG to examine the reasons for difficulty in urethral catheterization and to determine a safe approach to resolve these problems. Following retrograde urethral jelly injection, modified SUG (mSUG) was performed in male patients with difficulty in urethral catheterization. mSUG was performed using transcutaneous ultrasonography in patients for whom the catheter became lodged in the penile urethra. In other patients, mSUG was performed using transrectal ultrasonography. We divided the causes of difficult indwel...
Source: Journal of Medical Ultrasonics - February 5, 2016 Category: Radiology Source Type: research

Relationship between liver tissue stiffness and histopathological findings analyzed by shear wave elastography and compression testing in rats with non-alcoholic steatohepatitis
Conclusions Degree of liver stiffness measured by SWE and the Instron machine differed. SWE reflected mainly inflammation, whereas Instron machine-derived values primarily reflected fibrosis. This is the main source of discrepancies between measurements made with these two modalities. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - January 28, 2016 Category: Radiology Source Type: research

Impact of parametric imaging on contrast-enhanced ultrasound of breast cancer
Conclusions The use of parametric imaging improves the visibility of CEUS. The maximal diameter of the tumor determined on CEUS correlates substantially with the pathology. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - January 22, 2016 Category: Radiology Source Type: research

Correlation between the combination of apparent integrated backscatter–spectral centroid shift and bone mineral density
Abstract Purpose To introduce a new diagnostic parameter: the linear combination of apparent integrated backscatter and spectral centroid shift. Methods Ultrasonic backscatter measurements were performed at the calcanei of 1262 volunteers in vivo. The hip and spine bone mineral densities of the volunteers were measured using dual X-ray absorptiometry. The apparent integrated backscatter and spectral centroid shift were calculated. A new diagnostic parameter, i.e., the linear combination of apparent integrated backscatter and spectral centroid shift, was ...
Source: Journal of Medical Ultrasonics - January 11, 2016 Category: Radiology Source Type: research

Searchlight phenomenon: a novel artifact of the gallbladder
Conclusion The searchlight phenomenon is thought to be a range-ambiguity artifact of the ring-down artifact. Duodenal gas is thought to give rise to this artifact. When examining the gallbladder with ultrasound, knowledge of many artifacts including the searchlight phenomenon can prevent us from making a hazardous misdiagnosis. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - January 9, 2016 Category: Radiology Source Type: research

Inclusion of Journal of Medical Ultrasonics in MEDLINE
(Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - December 25, 2015 Category: Radiology Source Type: research

Industrial physicians and orthopedists taking care of sonographers with work-related musculoskeletal disorders
(Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - December 25, 2015 Category: Radiology Source Type: research

Relevance of transthoracic left atrial appendage wall velocity measurement in addition to left atrial volume for noninvasive and quantitative assessment of left atrial thrombogenesis in patients with atrial fibrillation and normal D-dimer levels
This study examined the role of left atrial (LA) appendage wall velocity (LAAWV) measurement in addition to LA size for the noninvasive assessment of thrombogenesis in patients with atrial fibrillation (AF) and normal plasma D-dimer levels. Methods In 58 non-valvular AF patients, LAAWV and the LA volume index (LAVI) were determined by transthoracic echocardiography. LA appendage flow velocity and severity of spontaneous echo contrast (SEC) were determined by transesophageal echocardiography. Results LAAWV was strongly correlated with LA appenda...
Source: Journal of Medical Ultrasonics - December 14, 2015 Category: Radiology Source Type: research

Efficacy of the echo pattern classification of ovarian tumors 2000 in conjunction with transvaginal ultrasonography for diagnosis of ovarian masses
Conclusions With the echo pattern classification, ovarian masses can be diagnosed easily and accurately upon transvaginal ultrasound. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - December 10, 2015 Category: Radiology Source Type: research

Standard method for ultrasound evaluation of renal arterial lesions
(Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - December 2, 2015 Category: Radiology Source Type: research

Percutaneous thrombin injection under sonographic guidance for exclusion of non-catheterizable post-pancreatitis pseudoaneurysm of the superior mesenteric artery: a minimally invasive and expeditious treatment option
We describe two cases of alcohol-related post-acute pancreatitis pseudoaneurysms arising from the second-order branches of the superior mesenteric artery (SMA) that were endoluminally inaccessible. Both cases were successfully treated with percutaneous thrombin injection into the pseudoaneurysm sac under ultrasound guidance. We suggest that endoluminally inaccessible pseudoaneurysms that are percutaneously accessible can be expeditiously treated with percutaneous thrombin injection. Further, due to the efficaciousness of this procedure, it could be considered as a first-line minimally invasive therapeutic option. (Source: ...
Source: Journal of Medical Ultrasonics - November 21, 2015 Category: Radiology Source Type: research

Low mechanical index contrast mode versus high mechanical index contrast mode: which is a more sensitive method for detecting Sonazoid microbubbles in the liver of normal subjects?
Abstract Purpose Using the low mechanical index (MI) contrast mode and the high MI contrast mode of contrast-enhanced ultrasonography, we evaluated which method is more sensitive for detecting Sonazoid microbubbles in the liver of normal subjects. Methods Thirteen normal subjects received an intravenous bolus injection of 0.2 mL of Sonazoid. We defined the intensity difference as the intensity post-injection minus the intensity pre-injection. We evaluated the intensity difference at the portal vein using both the low MI (0.21–0.23) and the hig...
Source: Journal of Medical Ultrasonics - November 14, 2015 Category: Radiology Source Type: research

Discordance between conventional ultrasonography and ElastPQ for assessing hepatic fibrosis in chronic hepatitis B: frequency and independent factors
Abstract Purpose To investigate the frequency of discordance and to identify factors associated with discordance between ultrasonographic and elastographic grades for assessing hepatic fibrosis in Asian patients with chronic hepatitis B. Methods Three hundred thirty-four patients with chronic hepatitis B for which both conventional ultrasonography and liver stiffness measurements using elastography were available were included. Patients were graded as ‘normal’, ‘chronic liver disease’, or ‘liver cirrhosis’ by ultrasono...
Source: Journal of Medical Ultrasonics - November 5, 2015 Category: Radiology Source Type: research

Elastography by acoustic radiation force impulse technology for differentiation of benign and malignant breast lesions: a meta-analysis
Conclusion Elastography by ARFI technology could be used as a good identification tool for differentiating benign and malignant breast lesions. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - October 28, 2015 Category: Radiology Source Type: research

Erratum to: Ultrasound exposure (mechanical index 1.8) with acoustic radiation force impulse evokes extrasystolic waves in rabbit heart under concomitant administration of an ultrasound contrast agent
(Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - October 28, 2015 Category: Radiology Source Type: research

High-intensity focused ultrasound treatment for intra-abdominal desmoid tumors: a report of four cases
Abstract Desmoid tumors are rare clonal fibroblastic proliferations that can arise at abdominal or extra-abdominal sites. Complete surgical resection is the primary treatment for resectable desmoid tumors, but a high rate of local recurrence has been reported even after complete resection. For patients with a recurrent tumor, the goals of treatment are to control the recurrence, maintain quality of life, and prolong survival. Radiofrequency ablation, radiotherapy, chemotherapy, and other medical therapies can be used as alternative methods, but there are considerable controversies over the roles of these methods i...
Source: Journal of Medical Ultrasonics - October 27, 2015 Category: Radiology Source Type: research

Contrast-enhanced ultrasonography with Sonazoid for diagnosis of gangrenous cholecystitis
Conclusions CEUS with Sonazoid is a useful and reproducible modality for diagnosing gangrenous cholecystitis. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - October 27, 2015 Category: Radiology Source Type: research

Assessment of a needle-tracking system for bipolar radiofrequency ablation
Conclusion The needle-tracking system is an accurate and useful system for bipolar radiofrequency ablation. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - October 26, 2015 Category: Radiology Source Type: research

Prediction of spontaneous vaginal delivery by transperineal ultrasound performed just after full cervical dilatation is determined
Conclusion Transperineal ultrasound examination just after full cervical dilatation was determined was useful in predicting spontaneous vaginal delivery. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - October 22, 2015 Category: Radiology Source Type: research

Associations between increased renal resistive index and cardiovascular events
Abstract Background and purpose Chronic kidney disease is a risk factor for cardiovascular disease (CVD). Renal resistive index (RI) measured by Doppler ultrasonography is associated with renal impairment. We investigated the relationship between RI and cardiac function, and evaluated the utility of RI for predicting cardiac events in patients with CVD. Methods and results Renal Doppler ultrasonography and echocardiography were performed in a total of 452 patients with CVD. Correlations of RI with serum creatinine and estimated glomerular filtration rate...
Source: Journal of Medical Ultrasonics - October 22, 2015 Category: Radiology Source Type: research

Changes in uterine flexion caused by cesarean section: correlation between post-flexion and deficient cesarean section scars
Conclusion Changes in uterine flexion after birth occurred more frequently in the women who had a cesarean delivery than in those who had a vaginal delivery, especially in the presence of a deficient cesarean section scar. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - October 20, 2015 Category: Radiology Source Type: research

Ultrasonographic characteristics of congenital corneal staphyloma
Abstract This case report describes the ultrasonographic characteristics of congenital corneal staphyloma (CCS) in a neonate on the birth day, with a massively staphylomatous and ectatic left cornea, which was forward protrusive between the eyelids. Ultrasound biomicroscopy (UBM) revealed the cornea of the left eye as thin and ectatic, with an irregular contour and unidentified layers. The anterior chamber was extraordinarily deep. Apart from histology, UBM can be used for understanding the microstructure of the anterior ocular segment, which may directly guide the diagnosis of CCS in a timely manner. (Source: Jou...
Source: Journal of Medical Ultrasonics - October 14, 2015 Category: Radiology Source Type: research

Two cases of immunoglobulin G4-related sclerosing cholangitis in which transabdominal ultrasonography was useful in diagnosis and follow-up observation
Abstract Immunoglobulin G4-related disease (IgG4-RD) represents a group of disorders that share features of inflammation, plasma cell infiltrates, and fibrosis. Sclerosing cholangitis is a disorder involving inflammation, scarring, and destruction of the bile ducts. IgG4-related sclerosing cholangitis (IgG4-SC) has been proposed as a bile duct lesion associated with IgG4-RD. This disease entity can be distinguished from other types of sclerosing cholangitis and classified into four types based upon the region of strictures revealed by cholangiography. Here, we present two cases in which the finding of bile duct wa...
Source: Journal of Medical Ultrasonics - October 14, 2015 Category: Radiology Source Type: research

Enhancing effect of phase coherence factor for improvement of spatial resolution in ultrasonic imaging
Conclusion The PCFs newly proposed in the present study showed better spatial resolutions than the conventional PCF. The proposed PCFs also realized better visualization of echoes from a diffuse scattering medium than the conventional PCF. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - October 7, 2015 Category: Radiology Source Type: research

Amplitude and phase estimator combined with the Wiener postfilter for medical ultrasound imaging
Conclusion The evaluation of the proposed beamformer on an experimental dataset confirms the results of simulations, in which the proposed beamformer improves the resolution and contrast in comparison with the standard APES beamformer. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - October 5, 2015 Category: Radiology Source Type: research

Solitary fibrous tumor of the breast: a case report and review of the literature
Abstract Solitary fibrous tumors (SFTs) are rare mesenchymal neoplasms that can be benign or malignant. SFTs have been most often documented in the pleura. Recently, involvement of extrapleural sites such as the abdomen, musculoskeletal soft tissue, upper respiratory tract, mediastinum, and head and neck were reported. Less than 15 cases of SFT of the breast have been reported. Here, we report a case of a pathologically proven SFT of the breast and review the literature on the radiologic findings. US imaging showed an oval, well-circumscribed, hypoechoic solid mass. A solitary fibrous tumor of the breast is a very...
Source: Journal of Medical Ultrasonics - October 3, 2015 Category: Radiology Source Type: research

Acknowledgment to reviewers
(Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - October 1, 2015 Category: Radiology Source Type: research

Editor’s note
(Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - October 1, 2015 Category: Radiology Source Type: research

Successful diagnosis of pericardial rupture caused by blunt chest trauma using contrast ultrasonography
Abstract A 65-year-old male developed acute myocardial infarction due to coronary artery dissection and tricuspid valve injury after blunt chest trauma. Acute myocardial infarction was treated by coronary artery intervention; however, refractory heart failure with pleural effusion remained. The first transthoracic echocardiography (TTE) on admission failed to clearly visualize the tricuspid valve and right ventricle due to poor image quality. A follow-up TTE with contrast ultrasonography revealed pericardial rupture in addition to tricuspid regurgitation. Ruptures of the tricuspid papillary muscle and pericardium ...
Source: Journal of Medical Ultrasonics - September 20, 2015 Category: Radiology Source Type: research

Noninvasive assessment of exercise tolerance using mitral annular velocities
Abstract Purpose To investigate the feasibility of evaluating exercise tolerance using lateral and septal mitral annular velocities in patients with preserved left ventricular ejection fraction (LVEF) and those with reduced LVEF. Method We studied 36 patients with LVEF ≥50 % and 36 with LVEF 
Source: Journal of Medical Ultrasonics - September 16, 2015 Category: Radiology Source Type: research

Transverse ultrasound assessment of the flexor pollicis longus tendon movement on the distal radius during wrist and finger motion in distal radius fracture with volar plating
Conclusions This study showed that the wrist dorsal flexion position with finger flexion could be the appropriate position to examine FPL tendon irritation after plating. Moreover, it would be effective for preventing FPL rupture to cover the FPL transverse gliding area approximately 10 mm radial to the vertex of the palmar bony prominence of the distal radius with the pronator quadratus and the intermediate fibrous zone. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - September 13, 2015 Category: Radiology Source Type: research

Vertebral artery Doppler waveform patterns for exclusive diagnosis of basilar artery stenosis and occlusion
Abstract Purpose The aim of this study was to evaluate the usefulness of vertebral artery (VA) pulsed Doppler waveform changes in excluding basilar artery (BA) stenosis/occlusion. Methods One-hundred and twenty-two patients with time-averaged peak flow velocity (MV) of bilateral VAs
Source: Journal of Medical Ultrasonics - September 11, 2015 Category: Radiology Source Type: research

Endoscopic ultrasonography in the diagnosis and treatment of a gastric wall abscess
Abstract A gastric wall abscess is rare and it can reportedly appear similar to a submucosal tumor on endoscopy. Few reports have described endoscopic ultrasonographic findings for a gastric wall abscess. An 84-year-old man was admitted to our hospital for tarry stools. Esophagogastroduodenoscopy showed an elevated lesion similar to a submucosal tumor at the posterior wall of the stomach. Erosion and a white coat were observed on top of the lesion. Endoscopic ultrasonography showed an anechoic lesion connected to the proper muscular layer with a hyperechoic area in the center of the lesion. The lesion was diagnose...
Source: Journal of Medical Ultrasonics - September 4, 2015 Category: Radiology Source Type: research

Uterine rupture at 10 weeks of gestation after laparoscopic myomectomy
Abstract The patient had a previous history of laparoscopic myomectomy. At 10 weeks of gestation, she visited our emergency center due to sudden abdominal pain. An ultrasound examination and MRI showed complete rupture of the uterine myometrium in the fundal wall and a floating gestation sac in Douglas’ fossa with fluid. Emergency abdominal laparotomy was immediately performed due to the diagnosis of uterine rupture. During surgery, a small defect of the myometrium was found in the posterior fundal wall of the uterus. Two-layer suturing was performed at the perforation hole. The occasional occurrence of...
Source: Journal of Medical Ultrasonics - September 4, 2015 Category: Radiology Source Type: research

Usefulness of transabdominal ultrasonography in excluding adnexal disease
Abstract Objectives To investigate the final diagnoses and examine the rate of detection of normal ovaries in patients with negative results for adnexa on transabdominal ultrasonography (TAUS) using current machines. Methods Of 188 eligible patients who underwent TAUS to assess lower abdominal pain, 158 were subsequently evaluated using other imaging modalities, surgical procedures, follow-up, or questionnaire data. Of these patients, 135 patients with negative results for adnexa on TAUS were included in the investigation of the final diagnoses. The rate...
Source: Journal of Medical Ultrasonics - September 4, 2015 Category: Radiology Source Type: research

A case of uterine rupture diagnosed based on routine focused assessment with sonography for obstetrics
Abstract The patient was a 38-year-old primigravida woman with a previous history of myomectomy via laparotomy. At 30 weeks of gestation, she visited our emergency center because of sudden severe abdominal pain. Routine focused assessment with sonography for obstetrics (FASO) indicated no echo-free space at Douglas’ pouch or between the spleen and kidney; however, echo-free spaces were visualized around the intestinal tract and at Morrison’s pouch. Therefore, a diagnosis of hemoperitoneum due to uterine rupture was suspected, and emergency cesarean section was planned. During surgery, a small defe...
Source: Journal of Medical Ultrasonics - September 3, 2015 Category: Radiology Source Type: research

Ultrasound exposure (mechanical index 1.8) with acoustic radiation force impulse evokes extrasystolic waves in rabbit heart under concomitant administration of an ultrasound contrast agent
Conclusions Arrhythmogenicity was observed during ultrasound (MI 1.8) with ARFI and concomitant administration of UCA in rabbits. Although the bolus administration of UCA was similar to its clinical use, which may not cause extra cardiac excitation, cardiac ultrasound examinations with ARFI should be carefully performed, particularly with concomitant use of UCA. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - September 3, 2015 Category: Radiology Source Type: research

A report of three cases of exophytic gastrointestinal stromal tumor detected by transabdominal ultrasound
In conclusion, TUS can be a starting point for diagnosing exophytic GISTs of the stomach. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - September 2, 2015 Category: Radiology Source Type: research

Contrast-enhanced sonography with Sonazoid as a new diagnostic tool for splenic hamartoma: a single case report
We report a case of non-symptomatic splenic hamartoma in a 40-year-old woman detected as an abdominal tumor by screening ultrasonography. The tumor was 4 cm in diameter, round, slightly hypoechoic, and associated with a cystic lesion. The tumor region was stained on enhanced computed tomography with prolonged enhancement, while the cystic lesion was not. The mass appeared as mainly isointense with partial hyperintensity on T1-weighted and as a mixed hypo- and hyperintense region on T2-weighted magnetic resonance images. 99mTc-labeled colloid scintigraphy demonstrated uptake in only the tumor region. CEUS with Sonazoid...
Source: Journal of Medical Ultrasonics - September 1, 2015 Category: Radiology Source Type: research

Splenic cystic lymphangioma with atypical ultrasound findings
We describe the case of an isolated splenic cystic lymphangioma affecting an elderly female patient. The patient was asymptomatic and the blood tests were normal. The tumor appeared on gray-scale ultrasound as an inhomogeneous, mostly hyperechoic septated mass, which is atypical for a cystic lymphangioma. Contrast-enhanced ultrasound and contrast-enhanced computed tomography suggested the benign nature of the tumor and narrowed the diagnosis. The tumor received histopathological confirmation after splenectomy. Various CT and MRI findings in splenic lymphangiomas have been described, but very few reports regarding CEUS exis...
Source: Journal of Medical Ultrasonics - August 27, 2015 Category: Radiology Source Type: research

Contrast-enhanced ultrasound for the evaluation of acute renal infarction
Abstract A 65-year-old male in the dilated phase of hypertrophic cardiomyopathy and with persistent atrial fibrillation was admitted to our hospital because of an episode of ventricular fibrillation following an appropriate shock from an implantable cardiac defibrillator (ICD). At admission, electrocardiography showed a normal sinus rhythm. He had complained of back pain 7 days after the ICD shock. Renal infarction was suspected, although computed tomography and magnetic resonance imaging could not be performed because of chronic renal failure and the presence of his ICD. We, therefore, used contrast-enhanced...
Source: Journal of Medical Ultrasonics - August 26, 2015 Category: Radiology Source Type: research

In memory: Floyd Dunn
(Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - August 20, 2015 Category: Radiology Source Type: research

Usefulness of antenatal ultrasound fetal morphological assessments in the first and second trimester: a study at a single Japanese university hospital
Conclusion Major congenital abnormalities were identified in the first trimester morphological assessment. We think the use of a combination of the first trimester ultrasound screening and the second trimester ultrasound scan for detecting fetal anomalies was effective. (Source: Journal of Medical Ultrasonics)
Source: Journal of Medical Ultrasonics - August 1, 2015 Category: Radiology Source Type: research

Ulnar nerve sonography in leprosy neuropathy
Abstract A 23-year-old woman presented with a half-year history of right forearm sensory and motor dysfunction. Ultrasound imaging revealed definite thickening of the right ulnar nerve trunk and inner epineurium, along with heterogeneous hypoechogenicity and unclear nerve fiber bundle. Color Doppler exhibited a rich blood supply, which was clearly different from the normal ulnar nerve presentation with a scarce blood supply. The patient subsequently underwent needle aspiration of the right ulnar nerve, and histopathological examination confirmed that granulomatous nodules had formed with a...
Source: Journal of Medical Ultrasonics - July 31, 2015 Category: Radiology Source Type: research

Weighted Capon beamformer combined with coded excitation in ultrasound imaging
Abstract Background Capon-based beamformers are well-known methods to improve the SNR and quality of medical ultrasound images. Furthermore, they can improve the resolution of the images unexpectedly more than conventional DAS beamformers. Another method used in radar, sonar, and ultrasound imaging to increase the SNR is coded excitation with linear frequency-modulated signal (chirp). Method In this paper, we illustrate that the combination of coded excitation with a Capon beamformer provides better resolution and higher SNR. However, this combination su...
Source: Journal of Medical Ultrasonics - July 27, 2015 Category: Radiology Source Type: research