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Knutsson, Anders
Publications (4 of 4) Show all publications
Tillander, B., Gauffin, H., Lyth, J., Knutsson, A. & Timpka, T. (2019). Symptomatic Achilles Tendons are Thicker than Asymptomatic Tendons on Ultrasound Examination in Recreational Long-Distance Runners. Sports (Basel, Switzerland), 7(12), Article ID E245.
Open this publication in new window or tab >>Symptomatic Achilles Tendons are Thicker than Asymptomatic Tendons on Ultrasound Examination in Recreational Long-Distance Runners
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2019 (English)In: Sports (Basel, Switzerland), ISSN 2075-4663, Vol. 7, no 12, article id E245Article in journal (Refereed) Published
Abstract [en]

There is a need for clinical indicators that can be used to guide the treatment of Achilles tendon complaints in recreational runners. Diagnostic ultrasound has recently been introduced for clinical decision support in tendon pain management. The aim of this study was to determine whether tendon thickness and morphological changes in the Achilles tendon detected in ultrasound examinations are associated with local symptoms in middle-age recreational long-distance runners. Forty-two Achilles tendons (21 middle-aged runners) were investigated by ultrasound examination measuring tendon thickness and a morphology score indicating tendinosis. The Generalized Estimating Equations method was applied in multiple models of factors associated with reporting a symptomatic tendon. Eleven symptomatic and 31 asymptomatic Achilles tendons were recorded. In the multiple model that used tendon thickness measured 30 mm proximal to the distal insertion, an association was found between thickness and reporting a symptomatic tendon (p < 0.001; OR 12.9; 95% CI 3.1 to 53.2). A qualitative morphology score was not found to be significantly associated with reporting a symptomatic tendon (p = 0.10). We conclude that symptomatic Achilles tendons were thicker than asymptomatic tendons on ultrasound examination among recreational long-distance runners and that the importance of parallel morphological findings need to be further investigated in prospective studies.

Place, publisher, year, edition, pages
MDPI, 2019
Keywords
achilles tendon, middle-aged, running, ultrasound
National Category
Clinical Medicine
Identifiers
urn:nbn:se:liu:diva-163311 (URN)10.3390/sports7120245 (DOI)31817429 (PubMedID)
Available from: 2020-01-31 Created: 2020-01-31 Last updated: 2020-02-18Bibliographically approved
Stenman, C., Glavas, R., Davidsson, J., Knutsson, A. & Smedby, Ö. (2015). Visualization of liver lesions in standardized video-documented ultrasonography - inter-observer agreement and effect of contrast injection. Medical ultrasonography, 17(4), 437-443
Open this publication in new window or tab >>Visualization of liver lesions in standardized video-documented ultrasonography - inter-observer agreement and effect of contrast injection
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2015 (English)In: Medical ultrasonography, ISSN 1844-4172, E-ISSN 2066-8643, Vol. 17, no 4, p. 437-443Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to evaluate the inter-observer agreement and effect of contrast injection on the visibility of liver lesions by radiologists reviewing ultrasound examinations acquired by a radiographer using a standardized examination protocol. Material and method: A retrospective review was conducted by two radiologists, independently of each other, of 115 ultrasound examinations of the liver with standardized examination protocols between January 2008 and December 2012. All patients included in the study had undergone surgery for colorectal cancer. Patients attending the two-year follow-up were included. Results: Focal findings, the most common of which were cysts, were seen in 42-43 out of the 115 patients before intravenous contrast and in 46-47 patients after intravenous contrast (p=0.012). The inter-observer agreement for focal findings was 86.1% before contrast, and 90.4% after contrast (n.s.), and the corresponding kappa values were 0.72 and 0.84, respectively. Conclusion: A good inter-observer agreement between two radiologists reviewing ultrasound examinations (standardized ultrasound cine-loop method acquired by a radiographer) after surgery for colorectal cancer was obtained. Injection of contrast medium increased the visibility of liver lesions.

Place, publisher, year, edition, pages
Cluj-Napoca, Romania: Societatea Romana de Ultrasonografie in Medicina si Biologie, 2015
Keywords
liver; contrast-enhanced ultrasound; inter-observer agreement; standardized examination
National Category
Radiology, Nuclear Medicine and Medical Imaging
Identifiers
urn:nbn:se:liu:diva-123790 (URN)10.11152/mu.2013.2066.174.vis (DOI)000365549400004 ()26649336 (PubMedID)
Available from: 2016-01-11 Created: 2016-01-11 Last updated: 2017-11-30Bibliographically approved
Stenman, C., Jamil, S., Thorelius, L., Knutsson, A. & Smedby, Ö. (2013). Do Radiologists Agree on Findings in Radiographer-Acquired Sonographic Examinations?. Journal of ultrasound in medicine, 32(3), 513-518
Open this publication in new window or tab >>Do Radiologists Agree on Findings in Radiographer-Acquired Sonographic Examinations?
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2013 (English)In: Journal of ultrasound in medicine, ISSN 0278-4297, E-ISSN 1550-9613, Vol. 32, no 3, p. 513-518Article in journal (Refereed) Published
Abstract [en]

OBJECTIVES:

Sonographic examinations are usually regarded as observer dependent, but a recently introduced method using documentation with cine loops acquired in a standardized way attempts to address this problem. The aim of this study was to evaluate the intraobserver and interobserver agreement of sonographic liver examinations using strictly standardized examination protocols with cine loop documentation.

METHODS:

Ninety-eight outpatients were examined by a radiographer using the standardized method. Three radiologists, each with 10 to 20 years of experience in sonography, reviewed the cine loops retrospectively. After 4 weeks, the review was repeated; the 3 radiologists were blinded to the initial reading. The κ coefficient was used to analyze intraobserver and interobserver agreement, and agreement in percent was also calculated.

RESULTS:

The intraobserver agreement was highest for concrements in the gallbladder (κ= 0.91-0.96) and lowest when assessing the need for further examination (κ = 0.38-0.64). For increased liver echogenicity, κ varied between 0.73 and 0.92 and for skip areas between 0.73 and 0.90. The interobserver agreement was also highest for concrements in the gallbladder (κ = 0.84-1.00) and lowest for the need for further examination (κ = -0.12-0.46). For most other findings, substantial intraobserver agreement was found.

CONCLUSIONS:

For sonographic examinations performed according to a standardized examination protocol by a radiographer and viewed by an experienced radiologist, good interobserver agreement was found, except for judgments of the need for further examinations.

Place, publisher, year, edition, pages
American Institute of Ultrasound in Medicine, 2013
Keywords
agreement, liver examination, observer, radiologist, sonography
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-90759 (URN)10.7863/jum.2013.32.3.513 (DOI)000315835900016 ()23443192 (PubMedID)
Note

On the day of the defence date of the Ph.D. Thesis the status of this artilce was Manuscript and the title was Do radiologists agree on findings in radiographer-acquired ultrasound liver examinations?

Available from: 2013-04-05 Created: 2013-04-05 Last updated: 2017-12-06
Björnsson, H., Norlin, R., Knutsson, A. & Adolfsson, L. (2010). Fewer rotator cuff tears fifteen years after arthroscopic subacromial decompression. Journal of shoulder and elbow surgery, 19(1), 111-115
Open this publication in new window or tab >>Fewer rotator cuff tears fifteen years after arthroscopic subacromial decompression
2010 (English)In: Journal of shoulder and elbow surgery, ISSN 1058-2746, E-ISSN 1532-6500, Vol. 19, no 1, p. 111-115Article in journal (Refereed) Published
Abstract [en]

Background: A successful clinical result is reported in 75% to 85% of impingement patients after arthroscopic subacromial decompression. The result is maintained over time, but few studies have investigated the integrity of the rotator cuff in these patients. Materials and methods: Using ultrasonography, we examined the integrity of the rotator cuff in 70 patients 15 years after arthroscopic subacromial decompression. All patients had an intact rotator cuff at the index procedure. Results: Tendons were still intact in 57 patients (82%), 10 (14%) had partial-thickness tears, and 3 (4%) had full-thickness tears. Discussion: The total number of 18% tears (partial and full thickness) in this study, including patients clinically diagnosed with subacromial impingement at a mean age of 60 years, is unexpectedly low compared with 40% degenerative tears reported in asymptomatic adults of the same age. Conclusion: Arthroscopic subacromial decompression seems to reduce the prevalence of rotator cuff tears in impingement patients. This appears attributable to elimination of extrinsic factors such as mechanical wear and bursitis. The potential effect of surgery on intrinsic cuff degeneration is unknown, but intrinsic factors may explain tears still developing despite decompression.

Place, publisher, year, edition, pages
Elsevier Science B.V., Amsterdam, 2010
Keywords
Impingement, long-term follow up, arthroscopic subacromial decompression, rotator cuff tear, rotator cuff degeneration, ultrasonography
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-56522 (URN)10.1016/j.jse.2009.04.014 (DOI)000277367800020 ()19556145 (PubMedID)
Available from: 2010-05-21 Created: 2010-05-21 Last updated: 2017-12-12
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