Publications by authors named "M H Hackenbroch"
Background: External impingement tests are considered as being particularly reliable for identifying subacromial and coracoid shoulder impingement mechanisms. The purpose of the present study was to evaluate if these tests are likely to provoke an internal shoulder impingement mechanism which, in cases of a pathologic condition, can lead to a positive test result.
Method: In 37 subjects, the mechanical contact between the glenoid rim and the rotator cuff (RC) was measured quantitatively and qualitatively in external impingement test positions using an open MRI system.
Background: Understanding the mechanisms of shoulder impingement created by clinical tests is crucial to accurately evaluate the condition. The objective of this study was to relate mechanisms of subacromial and coracoid impingement occurring in positions of the shoulder during clinical examination, in quantitative and qualitative terms.
Methods: A 1.
Article Synopsis
- The study aimed to compare standard-dose CT (SDCT) and low-dose CT (LDCT) protocols in terms of radiation doses and image quality for lung interventions.
- Results showed that LDCT achieved a significant 68.6% reduction in radiation dose while maintaining acceptable diagnostic quality, with no major differences in complication rates between the two groups.
- Iterative reconstruction methods in the LDCT group offered better image quality than traditional filtered back projection, making LDCT a safer and more effective option for these procedures.
Background And Purpose: Unloading alters the thickness of joint cartilage. It is unknown, however, to what extent unloading leads to a loss of glycosaminoglycans (GAGs) in the cartilage tissue. We hypothesized that muscle forces, in addition to axial loading, are necessary to maintain the joint cartilage GAG content of the knee and the upper and lower ankle.
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- During spaceflight, astronauts experience an increase in intervertebral disc height and report lower back pain, potentially due to the expansion of these discs.
- A pilot study investigated how simulated bedrest affects the glycosaminoglycan content in lumbar intervertebral discs by analyzing MRI scans before and after a 21-day head-down-tilt immobilization.
- The results indicated a significant decrease in ΔT1 values after bedrest, suggesting an increase in glycosaminoglycan content, particularly in certain areas of the discs, which contradicts earlier expectations regarding disc behavior during prolonged immobility.