scholarly journals Ultrasound Characterization of Patellar Tendon in Non-Elite Sport Players with Painful Patellar Tendinopathy: Absolute Values or Relative Ratios? A Pilot Study

Diagnostics ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 882
Author(s):  
José L. Arias-Buría ◽  
César Fernández-de-las-Peñas ◽  
Jorge Rodríguez-Jiménez ◽  
Gustavo Plaza-Manzano ◽  
Joshua A. Cleland ◽  
...  
Keyword(s):  
Pilot Study ◽  
Patellar Tendon ◽  
Operating Characteristic ◽  
Diagnostic Value ◽  
Patellar Tendinopathy ◽  
Width Ratio ◽  
Elite Sport ◽  
Cross Sectional ◽  
Blinded Assessor

Imaging findings in patellar tendinopathy are questioned. The aim of this pilot study was to characterize ultrasound measures, by calculating ultrasound ratio and neovascularization of the patellar tendon in non-elite sport players with unilateral painful patellar tendinopathy. Cross-sectional area (CSA), width, and thickness of the patellar tendon were assessed bilaterally in 20 non-elite sport-players with unilateral painful patellar tendinopathy and 20 asymptomatic controls by a blinded assessor. Ultrasound ratios were calculated to discriminate between symptomatic and asymptomatic knees. The Ohberg score was used for characterizing neovascularization. We found that non-elite sport players with patellar tendinopathy exhibited bilateral increases in CSA, width, and thickness of the patellar tendon compared to asymptomatic controls (Cohen d > 2). The ability of ultrasound ratios to discriminate between painful and non-painful patellar tendons was excellent (receiver operating characteristic, ROC > 0.9). The best diagnostic value (sensitivity: 100% and specificity: 95%) was observed when a width ratio ≥ 1.29 between the symptomatic and asymptomatic patellar tendon was used as a cut-off. Further, neovascularization was also observed in 70% of non-elite sport players with unilateral patellar tendinopathy. A greater CSA ratio was associated with more related-disability and higher tendon neovascularization. This study reported that non-elite sport players with painful unilateral patellar tendinopathy showed structural ultrasound changes in the patellar tendon when compared with asymptomatic controls. Ultrasound ratios were able to discriminate between symptomatic and asymptomatic knees. Current results suggest that ultrasound ratios could be a useful imaging outcome for identifying changes in the patellar tendon in sport players with unilateral patellar tendinopathy.

The contribution of strain patterns in characterization of prostate peripheral zone lesions at transrectal ultrasonography

2012 ◽  
Vol 53 (1) ◽  
pp. 119-126 ◽  
Author(s):  
Yan Zhang ◽  
Jie Tang ◽  
Yan-mi Li ◽  
Xiang Fei ◽  
En-hui He ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Operating Characteristic ◽  
Characteristic Curve ◽  
Peripheral Zone ◽  
Diagnostic Value ◽  
Ultrasound Elastography ◽  
Transrectal Ultrasonography ◽  
Targeted Biopsy

Background Elasticity is an important characteristic of tissue. During an elastography examination, various strain images of lesions are observed, and a suitable classification of strain patterns (SP) may provide vital diagnostic information about lesions. Numerous studies have shown that ultrasound elastography can improve the detection of prostate cancer, but the diagnostic value of SP classification has not yet been fully evaluated. Purpose To investigate the contribution of SP on the characterization of prostate peripheral zone lesions by transrectal real-time tissue elastography (TRTE) in combination with conventional transrectal ultrasonography (TRUS). Material and Methods One hundred and seventy-one patients with suspected prostate cancer underwent TRUS and TRTE examinations. The SPs of the suspicious lesions were classified into five scores by TRTE according to the degree and distribution of strain. All findings were confirmed by transrectal systematic 12-core biopsies and targeted biopsies for suspicious areas detecting by TRUS and/or TRTE. Results One hundred and forty-eight of 171 patients had high-quality TRTE imaging and were included into the study. When a cut-off point of SP score III was used, the area under the receiver-operating characteristic curve (AUC) was, respectively, 0.75 (95% CI: 0.67–0.83), 0.85 (95% CI: 0.78–0.91) and 0.84 (95% CI: 0.77–0.91) for the diagnosis of prostate cancer by TRUS, TRTE and TRTE + TRUS. A linear tendency of SP and Gleason scores was observed in scores III-V. The detection rate of prostate cancer using TRTE-targeted biopsy (75.8%) was significantly higher than that of systematic 12-core biopsy plus TRUS-targeted biopsy (14.5%) ( P = 0.00). Conclusion This study suggests the significant contribution of SP on characterization of prostate peripheral zone lesions and the improvement of TRTE-targeted biopsy on detection of prostate cancer.

scholarly journals Prevalence of Patellar Tendinopathy and Patellar Tendon Abnormality in Male Collegiate Basketball Players: A Cross-Sectional Study

2019 ◽  
Vol 54 (9) ◽  
pp. 953-958 ◽  
Author(s):  
Marcey Keefer Hutchison ◽  
Jeff Houck ◽  
Tyler Cuddeford ◽  
Robin Dorociak ◽  
Jason Brumitt
Keyword(s):  
Confidence Interval ◽  
Patellar Tendon ◽  
Odds Ratio ◽  
National Collegiate Athletic Association ◽  
Cross Sectional Study ◽  
Patellar Tendinopathy ◽  
Sectional Study ◽  
Basketball Players ◽  
Cross Sectional ◽  
Collegiate Basketball

Context Patellar tendinopathy (PT) is a degenerative condition known to affect athletes who participate in sports such as basketball and volleyball. Patellar tendinopathy is a challenging condition to treat and may cause an athlete to prematurely retire from sport. The prevalence of PT in male collegiate basketball players is unknown. Objective To determine the prevalence of PT and patellar tendon abnormality (PTA) in a population of male collegiate basketball players. Design Cross-sectional study. Setting National Collegiate Athletic Association Divisions II and III, National Association of Intercollegiate Athletics, and Northwest Athletic Conference male collegiate basketball teams were assessed in a university laboratory setting. Patients or Other Participants Ninety-five male collegiate basketball players (age = 20.0 ± 1.7 years). Main Outcome Measure(s) A diagnostic ultrasound image of an athlete's patellar tendon was obtained from each knee. Patellar tendinopathy was identified based on a player's symptoms (pain with palpation) and the presence of a hypoechoic region on an ultrasonographic image. Results A majority of participants, 53 of 95 (55.8%), did not present with pain during palpation or ultrasonographic evidence of PTA. Thirty-two basketball players (33.7%) displayed ultrasonographic evidence of PTA in at least 1 knee; 20 of those athletes (21.1%) had PT (pain and tendon abnormality). Nonstarters were 3.5 times more likely to present with PTA (odds ratio = 3.5, 95% confidence interval = 1.3, 9.6; P = .017) and 4 times more likely to present with PT (odds ratio = 4.0, 95% confidence interval = 1.1, 14.8; P = .038) at the start of the season. Conclusions One in 3 male collegiate basketball players presented with either PT or PTA. Sports medicine professionals should evaluate basketball athletes for PT and PTA as part of a preseason screening protocol.

scholarly journals Diagnostic Accuracy of 256-Detector Row Computed Tomography in Detection and Characterization of Incidental Pancreatic Cystic Lesions

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
D. Ippolito ◽  
P. Allegranza ◽  
P. A. Bonaffini ◽  
C. Talei Franzesi ◽  
F. Leone ◽  
...  
Keyword(s):  
Diagnostic Value ◽  
Wall Thickening ◽  
Cystic Lesions ◽  
Imaging Analysis ◽  
Cross Sectional ◽  
Common Location ◽  
Cross Sectional Imaging ◽  
Age Range ◽  
Mural Nodules

Purpose. To assess the diagnostic value of 256-detector row MDCT in the characterization of incidentally detected pancreatic cystic lesions (PCLs).Materials and Methods. We retrospectively reviewed 6389 studies performed on a 256-row detector scanner, wherein ≥1 PCLs were incidentally detected. Images from a total of 192 patients (99 females; age range 31–90 years) were analysed referring to morphologic predictive signs of malignancy, including multifocality, inner septa, wall thickening, and mural enhancing nodules.Results. We evaluated 292 PCLs in 192 patients (solitary in 145 and ≥2 in 47; incidence 2.05%). Size ranged from 3 to 145 mm (mean 15 mm); body was the most common location (87/292; 29.8%). Intralesional septa were detected in 52/292 lesions (17.8%), wall thickening >2 mm in 13 (4.5%), enhancing wall and mural nodules in 15 (5.1%) and 12 (4.1%), respectively. Communication with ductal system was evident in 45 cases. The most common diagnoses, established by histology or imaging analysis, were IPMNs (about 86%), while serous cystic neoplasia (3.7%) and metastases (0.5%) were the less common.Conclusion. MDCT provides detailed features for characterization of PCLs, which are incidentally discovered with increased frequency due to the widespread use of cross-sectional imaging.

Diagnostic Value of Serum d-Dimer Level for Tubo-Ovarian Abscess: A Cross-Sectional Pilot Study

2015 ◽  
Vol 22 (8) ◽  
pp. 927-931 ◽  
Author(s):  
Bulent Yilmaz ◽  
Burcu Kasap ◽  
Mustafa Demir ◽  
Kemal Gungorduk ◽  
Sefa Kelekci ◽  
...  
Keyword(s):  
Pilot Study ◽  
Diagnostic Value ◽  
Cross Sectional ◽  
Ovarian Abscess ◽  
D Dimer

scholarly journals DIAGNOSTIC VALUE OF Plasmotec® Malaria-3 ANTIGEN DETECTION ON MICROSCOPY GOLD STANDARD

2020 ◽  
Vol 26 (2) ◽  
Author(s):  
Trieva Verawaty Butarbutar ◽  
Puspa Wardhani ◽  
Aryati Aryati
Keyword(s):  
Gold Standard ◽  
Operating Characteristic ◽  
Plasmodium Species ◽  
Diagnostic Value ◽  
Cross Sectional Study ◽  
Specific Protein ◽  
P Value ◽  
Cross Sectional ◽  
Malaria Rapid Diagnostic Tests ◽  
Diagnostic Values

Plasmotec® Malaria-3 is a rapid malaria diagnostic test that uses 4 line tests and targets three malaria proteins, namely Plasmodium falciparum specific protein (HRP-2), Plasmodium vivax-specific LDH (Pv-LDH) and non-specific Plasmodium LDH (pLDH). Microscopy as a gold standard has many disadvantages and the availability of malaria rapid diagnostic tests (RDTs) in detecting three proteins is still very limited. This study aimed to determine the diagnostic value of Plasmotec® Malaria-3 against gold standard microscopy, comparing the Plasmotec® Malaria-3 and microscopy antigen species detection, determine the parasitemia index cut-off using Plasmotec® Malaria-3. This study was a cross-sectional study with 105 whole blood samples obtained from the Merauke Papua General Hospital which fulfilled the inclusion and exclusion criteria. Samples were examined by thick and thin drops and then examined with Plasmotec® Malaria-3. Diagnostic values of Plasmotec® Malaria-3 against the microscopy were Sn 100%, Sp 98.04%, PPV 98.18%, NPV 100%, LR + 51, LR-0, diagnostic accuracy of 99.05%. Comparison of Plasmodium species between Plasmotec® Malaria-3 and microscopy was not significantly different, p-value = 0.172. The cut-off of parasitemia index in P. falciparum and P. vivax in Plasmotec® Malaria-3 based on the Receiver Operating Characteristic (ROC) curve could not be determined with AUC=0.577, p-value=0.385 and AUC=0.423, p-value=0.385 was respectively. The conclusion of this study was that the comparison of Plasmodium species between Plasmotec® Malaria-3, and microscopy was not significantly different. This study suggested that a further research is needed to find the diagnostic value of non-falciparum and non-vivax Plasmodium against Plasmotec®Malaria-3.

scholarly journals Relationship between the anteroposterior diameter of the patellar tendon. Pain and functionality in volleyball players

2019 ◽  
Vol 02 (02) ◽  
pp. 067-067
Author(s):  
Calvo Gonell A. ◽  
Macia Soler L. ◽  
Moncho J.
Keyword(s):  
Patellar Tendon ◽  
Sports Injuries ◽  
Cross Sectional Study ◽  
Musculoskeletal Ultrasound ◽  
Patellar Tendinopathy ◽  
Ground Substance ◽  
Linear Regression Models ◽  
Cross Sectional ◽  
Anteroposterior Diameter ◽  
Volleyball Players

Abstract Introduction and Aim Overuse injuries in volleyball represent between 50% and 80% of total injuries, of which, 80% are patellar tendinopathies. Volleyball is the sport with the greatest prevalence of patellar tendinopathy, estimated at 44.6%, followed by basketball with 31.9%. The tendon thickness bears a close and direct relationship with abnormal and diffuse images with accumulation of ground substance, and affecting both sexes, although less marked in women. Aim To determine whether the antero-posterior diameter of the patellar tendon in volleyball players is associated with a greater sensation of pain and reduced functionality. Material and Methods An observational, descriptive, cross-sectional study on volleyball players. The scores on the VISA-P scale, the visual analog scale (VAS) and, using musculoskeletal ultrasound, the anteroposterior diameter of the patellar tendon at 5 and 10 mm distal to the inferior pole of the patella. Multiple linear regression models were constructed to adjust the effect of the anteroposterior diameter on the VAS and the VISA-P scores. Results The final sample comprised 112 players. The anteroposterior diameter was greater in men and was significantly associated with scores on the VAS and the VISA-P for both tendons, and therefore, the greater the score of the diameter, the greater the score on the VAS and the lesser the score on the VISA-P. Conclusions The measurement of the antero-posterior diameter of the patellar tendon using musculoskeletal ultrasound may be useful for the prevention of sports injuries in volleyball players, as it is significantly associated with a greater perception of pain and reduced functionality.

scholarly journals Patellar Tendon Structural Adaptations Occur during Pre-Season and First Competitive Cycle in Male Professional Handball Players

2021 ◽  
Vol 18 (22) ◽  
pp. 12156
Author(s):  
Silvia Ortega-Cebrián ◽  
Ramon Navarro ◽  
Sergi Seda ◽  
Sebastià Salas ◽  
Myriam Guerra-Balic
Keyword(s):  
Patellar Tendon ◽  
Cross Sectional Study ◽  
Patellar Tendinopathy ◽  
Sectional Study ◽  
Cross Sectional ◽  
Structural Alterations ◽  
Counter Movement Jump ◽  
Injured Tendon ◽  
Structural Adaptations ◽  
Distal Tendon

Background: While there is evidence that tendon adapts to training load, structural alterations in the patellar tendon in response to training loads are still unclear. The aim of this study is to identify changes in patellar tendon structure throughout pre-season and after finalizing the first competitive cycle. Methods: Nineteen professional handball players participated in the aforesaid cross-sectional study, in which patellar tendon scan and counter movement jump (CMJ) performance were conducted. Measurements were taken on the first and last day of pre-season training, and at the end of the first competitive cycle. Results: The results revealed that variation on the tendon structure occurred, mainly at the end of pre-season training; for injured tendons this occurred at the proximal (Right p = 0.02), distal (Right p = 0.01), and (Left p = 0.02) tendon, while changes in healthy tendons occurred at the mid (Left p = 0.01) and distal tendon (Right p = 0.01). At the end of the first competitive cycle, changes were observed in the distal injured tendon (p = 0.02). Conclusion: Patellar tendon shows greater structural change after completing pre-season training than at the end of the first competitive cycle, from which it may be inferred that gradual loading during pre-season training allows the tendon to adapt and potentially decrease the onset of patellar tendinopathy.

Microstructural characterization of CoPtCr/Cr thin film disks by cross-section TEM and elongated probe micro-diffraction

1991 ◽  
Vol 49 ◽  
pp. 762-763
Author(s):  
M.A. Parker ◽  
K.E. Johnson ◽  
C. Hwang ◽  
A. Bermea
Keyword(s):  
Magnetic Recording ◽  
Electron Probe ◽  
Microstructural Characterization ◽  
Crystallographic Structure ◽  
Recording Media ◽  
Layer By Layer ◽  
Cross Sectional ◽  
New Techniques ◽  
Polished Side

We have reported the dependence of the magnetic and recording properties of CoPtCr recording media on the thickness of the Cr underlayer. It was inferred from XRD data that grain-to-grain epitaxy of the Cr with the CoPtCr was responsible for the interaction observed between these layers. However, no cross-sectional TEM (XTEM) work was performed to confirm this inference. In this paper, we report the application of new techniques for preparing XTEM specimens from actual magnetic recording disks, and for layer-by-layer micro-diffraction with an electron probe elongated parallel to the surface of the deposited structure which elucidate the effect of the crystallographic structure of the Cr on that of the CoPtCr.XTEM specimens were prepared from magnetic recording disks by modifying a technique used to prepare semiconductor specimens. After 3mm disks were prepared per the standard XTEM procedure, these disks were then lapped using a tripod polishing device. A grid with a single 1mmx2mm hole was then glued with M-bond 610 to the polished side of the disk.

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