Spatial smoothing coherence factor for ultrasound computed tomography

2016 ◽  
Author(s):  
Cuijuan Lou ◽  
Mengling Xu ◽  
Mingyue Ding ◽  
Ming Yuchi
Keyword(s):  
Computed Tomography ◽  
Spatial Smoothing ◽  
Coherence Factor ◽  
Ultrasound Computed Tomography

Coherence Factor-Like Beamforming for Ultrasound Computed Tomography

2020 ◽  
Vol 10 (3) ◽  
pp. 672-676
Author(s):  
Shanshan Wang ◽  
Liang Zeng ◽  
Junjie Song ◽  
Liang Zhou ◽  
Mingyue Ding ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Center Frequency ◽  
Medical Ultrasound ◽  
Practical Application ◽  
Image Brightness ◽  
Coherence Factor ◽  
Ultrasound Computed Tomography ◽  
Breast Phantom ◽  
Black Region ◽  
Type Transducer

Ultrasound computed tomography (USCT) has important clinical application prospect in breast cancer screening and early diagnosis. In this paper, six kinds of coherence factor-like beamforming methods have been applied to improve the image quality for USCT, including coherence factor (CF), phase coherence factor (PCF), sign coherence factor (SCF), phasor dispersion based coherence factor (PDCF), spatial smoothed coherence factor (SSCF) and spatio-temporally smoothed coherence factor (STSCF). The mentioned methods were verified with the radio-frequency (RF) data of the breast phantom captured by the USCT system developed in the Medical Ultrasound Laboratory. The ring-type transducer has 1024 elements with a center frequency of 2.5 MHz. Experimental results show that the reconstructed images of the breast phantom by the CF gets the highest contrast to noise ratio (CNR), but overall image brightness reduces significantly. PCF gets the lowest variance and provides a more homogenous background. STSCF beamforming method can improve the robustness of the PCF and having the ability to suppress clutter while significant removal of black region artifacts. For practical application, these coherence factor-like beamforming methods can be implemented with low computational complexity.

Comparison of Four Forward Models for Breast Imaging in Ultrasound Computed Tomography

2019 ◽  
Vol 28 (4) ◽  
pp. 805-816 ◽  
Author(s):  
Ruijing Li ◽  
Houjin Chen ◽  
Yahui Peng ◽  
Jupeng Li
Keyword(s):  
Computed Tomography ◽  
Breast Imaging ◽  
Forward Models ◽  
Ultrasound Computed Tomography

scholarly journals Vasitis: clinical and ultrasound confusion with inguinal hernia clarified by computed tomography

2013 ◽  
Vol 5 (4) ◽  
pp. 74
Author(s):  
Kathleen Eddy ◽  
Bruce Piercy ◽  
Richard Eddy
Keyword(s):  
Computed Tomography ◽  
Inguinal Hernia ◽  
Spermatic Cord ◽  
Vas Deferens ◽  
The Other ◽  
Other Hand ◽  
Ultrasound Computed Tomography ◽  
Ultrasound Findings ◽  
Duplex Doppler

Vasitis or inflammation of the vas deferens is a rarely describedcondition categorized by Chan & Schlegel1 as either generallyasymptomatic vasitis nodosa or the acutely painful infectious vasitis.Clinically, infectious vasitis presents with nonspecific symptomsof localized pain and swelling that can be confused with other,more common conditions such as epididymitis, orchitis, testiculartorsion, and inguinal hernia. Ultrasound with duplex Doppler scanningcan be used to exclude epididymitis, orchitis, and testiculartorsion. On the other hand, while inguinal hernia is difficult todifferentiate from vasitis using ultrasound, computed tomography(CT) is diagnostic. We describe 2 cases of vasitis with clinicaland ultrasound findings that initially were interpreted as inguinalhernias. In both patients, CT was diagnostic for vasitis showing anedematous spermatic cord and no hernia. Urine cultures in bothpatients were negative, but the symptoms resolved with antibiotictreatment.

scholarly journals Mucinous Neoplasm of the Appendix as a Mimic of Cystic Adnexal Pathology

2018 ◽  
Vol 8 ◽  
pp. 32 ◽  
Author(s):  
Chris Hutchinson ◽  
Jonathan Lyske ◽  
Vimal Patel ◽  
Gavin Low
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Mucinous Tumor ◽  
Imaging Findings ◽  
Resonance Imaging ◽  
Mucinous Neoplasm ◽  
Ultrasound Computed Tomography ◽  
Adnexal Pathology

Pelvic pain presents a common diagnostic conundrum with a myriad of causes ranging from benign and trivial to malignant and emergent. We present a case where a mucinous neoplasm of the appendix acted as a mimic for tubular adnexal pathology on imaging. With the associated imaging findings on ultrasound, computed tomography, and magnetic resonance imaging, we wish to raise awareness of mucinous tumors of the appendix when tubular right adnexal pathology is present both in the presence of pelvic or abdominal pain or when noted incidentally. Tubular pathology such as uncomplicated paraovarian cysts or hydrosalpinx is frequently treated conservatively with long-interval follow-up imaging or left to clinical follow-up. Thus, if incorrectly diagnosed as tubular pathology, an appendix mucocele or mucinous neoplasm of the appendix is likely to be undertreated. We wish to clarify some of the confusion around nomenclature and classification of the multiple entities that are comprised by the terms mucocele and mucinous tumor of the appendix.

scholarly journals Application of Different Imaging Methods in the Early Diagnosis of Primary Hepatic Carcinoma

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Xin’ai Wu ◽  
Jianbo Li ◽  
Cheng Wang ◽  
Guojian Zhang ◽  
Na Zheng ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Early Stage ◽  
Survival Rates ◽  
Hepatic Carcinoma ◽  
Imaging Methods ◽  
Positron Emission ◽  
Ultrasound Computed Tomography ◽  
Primary Hepatic Carcinoma ◽  
The Common ◽  
The One

Primary hepatic carcinoma (PHC) is the one of the most common tumors and the common cause of cancer death in the world. Detecting PHC in its early stage by imaging methods may greatly increase survival rates of patients. Ultrasound, computed tomography, magnetic resonance imaging, and positron emission tomography/computed tomography are common imaging methods in the diagnosis of PHC. In this paper, the application of different imaging methods in diagnosing the primary hepatic carcinoma will be discussed.

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