TH-D-AUD C-02: Reliability Study of Ultrasound Tissue Characterization in Quantitative Measurement of Radiation-Induced Breast Tissue Toxicity

Ultrasound examination is advised for early post-kidney transplant assessment. Grayscale median (GSM) quantification is novel in the kidney transplant field, with no systematic assessment previously reported. In this prospective cohort study, we measured the post-operative GSM in a large cohort of adult kidney transplant recipients (KTR) who consecutively underwent Doppler ultrasound directly after transplantation (within 24 h), compared it with GSM in nontransplanted patients, and investigated its association with baseline and follow-up characteristics. B-mode images were used to calculate the GSM in KTR and compared with GSM data in nontransplanted patients, as simulated from summary statistics of the literature using a Mersenne twister algorithm. The association of GSM with baseline and 1-year follow-up characteristics were studied by means of linear regression analyses. In 282 KTR (54 ± 15 years old, 60% male), the median (IQR) GSM was 55 (45–69), ranging from 22 to 124 (coefficient of variation = 7.4%), without differences by type of donation (p = 0.28). GSM in KTR was significantly higher than in nontransplanted patients (p < 0.001), and associated with systolic blood pressure, history of cardiovascular disease, and donor age (std. β = 0.12, −0.20, and 0.13, respectively; p < 0.05 for all). Higher early post-kidney transplant GSM was not associated with 1-year post-kidney transplant function parameters (e.g., measured and estimated glomerular filtration rate). The data provided in this study could be used as first step for further research on the application of early postoperative ultrasound in KTR.

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A method for quantitative measurement of lumbar intervertebral disc structures: an intra- and inter-rater agreement and reliability study

Chiropractic & Manual Therapies ◽

10.1186/2045-709x-21-26 ◽

2013 ◽

Vol 21 (1) ◽

pp. 26 ◽

Cited By ~ 14

Author(s):

Andreas Tunset ◽

Per Kjaer ◽

Shadi Samir Chreiteh ◽

Tue Secher Jensen

Keyword(s):

Intervertebral Disc ◽

Quantitative Measurement ◽

Rater Agreement ◽

Reliability Study ◽

Lumbar Intervertebral Disc

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Microstructural breast tissue characterization: a head-to-head comparison of Diffusion Weighted Imaging and Acoustic Radiation Force Impulse elastography with clinical implications

European Journal of Radiology ◽

10.1016/j.ejrad.2021.109926 ◽

2021 ◽

pp. 109926

Author(s):

Panagiotis Kapetas ◽

Paola Clauser ◽

Ruxandra-Iulia Milos ◽

Sara Vigano ◽

Maria Bernathova ◽

...

Keyword(s):

Diffusion Weighted Imaging ◽

Breast Tissue ◽

Tissue Characterization ◽

Acoustic Radiation ◽

Radiation Force ◽

Acoustic Radiation Force ◽

Acoustic Radiation Force Impulse ◽

Clinical Implications ◽

Diffusion Weighted

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Ultrasonic Measurement of Temperature Rise in Breast Cyst and in Neighbouring Tissues as a Method of Tissue Differentiation

Archives of Acoustics ◽

10.1515/aoa-2016-0076 ◽

2016 ◽

Vol 41 (4) ◽

pp. 791-798 ◽

Cited By ~ 1

Author(s):

Barbara Gambin ◽

Michał Byra ◽

Eleonora Kruglenko ◽

Olga Doubrovina ◽

Andrzej Nowicki

Keyword(s):

Probability Density ◽

Breast Tissue ◽

Tissue Characterization ◽

Heating Process ◽

Ultrasound Images ◽

Bioheat Equation ◽

Acoustical Properties ◽

Breast Cyst ◽

Malignant Lesions ◽

Backscattered Signals

Abstract Texture of ultrasound images contain information about the properties of examined tissues. The analysis of statistical properties of backscattered ultrasonic echoes has been recently successfully applied to differentiate healthy breast tissue from the benign and malignant lesions. We propose a novel procedure of tissue characterization based on acquiring backscattered echoes from the heated breast. We have proved that the temperature increase inside the breast modifies the intensity, spectrum of the backscattered signals and the probability density function of envelope samples. We discuss the differences in probability density functions in two types of tissue regions, e.g. cysts and the surrounding glandular tissue regions. Independently, Pennes bioheat equation in heterogeneous breast tissue was used to describe the heating process. We applied the finite element method to solve this equation. Results have been compared with the ultrasonic predictions of the temperature distribution. The results confirm the possibility of distinguishing the differences in thermal and acoustical properties of breast cyst and surrounding glandular tissues.

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Breast tissue characterization using FARMA modeling of ultrasonic RF echo

Ultrasound in Medicine & Biology ◽

10.1016/j.ultrasmedbio.2004.08.023 ◽

2004 ◽

Vol 30 (10) ◽

pp. 1397-1407 ◽

Cited By ~ 13

Author(s):

Burak Alacam ◽

Birsen Yazici ◽

Nihat Bilgutay ◽

Flemming Forsberg ◽

Catherine Piccoli

Keyword(s):

Breast Tissue ◽

Tissue Characterization

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Running a Marathon—Its Influence on Achilles Tendon Structure

Journal of Athletic Training ◽

10.4085/1062-6050-49-19 ◽

2020 ◽

Vol 55 (2) ◽

pp. 176-180 ◽

Cited By ~ 1

Author(s):

Lucas Maciel Rabello ◽

Iris Sophie Albers ◽

Mathijs van Ark ◽

Ron L. Diercks ◽

Inge van den Akker-Scheek ◽

...

Keyword(s):

Achilles Tendon ◽

Sports Medicine ◽

Tissue Characterization ◽

Case Series ◽

Type I ◽

Ultrasound Tissue Characterization ◽

Type Iv ◽

Imaging Tool ◽

Cyclic Movements ◽

Echo Type

Context Several studies have been conducted to better understand the effect of load on the Achilles tendon structure. However, the effect of a high cumulative load consisting of repetitive cyclic movements, such as those that occur during the running of a marathon, on Achilles tendon structure is not yet clear. Clinicians, coaches, and athletes will benefit from knowledge about the effects of a marathon on the structure of the Achilles tendon. Objective To investigate the short-term response of the Achilles tendon structure to running a marathon. Design Case series (prospective). Setting Sports medicine centers. Patients or Other Participants Ten male nonelite runners who ran in a marathon. Main Outcomes Measure(s) Tendon structure was assessed before and 2 and 7 days after a marathon using ultrasound tissue characterization (UTC), an imaging tool that quantifies tendon organization in 4 echo types (I–IV). Echo type I represents the most stable echo pattern, and echo type IV, the least stable. Results At 7 days postmarathon, both the insertional and midportion structure changed significantly. At both sites, the percentage of echo type II increased (insertion P < .01; midportion P = .02) and the percentages of echo types III and IV decreased (type III: insertion P = .01; midportion P = .02; type IV: insertion P = .01; midportion P < .01). Additionally, at the insertion, the percentage of echo type I decreased (P < .01). Conclusions We observed the effects of running a marathon on the Achilles tendon structure 7 days after the event. Running the marathon combined with the activity performed shortly thereafter might have caused the changes in tendon structure. This result emphasizes the importance of sufficient recovery time after running a marathon to prevent overuse injuries.

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