Publications by authors named "K T Block"
Background And Objectives: Vestibular schwannomas demonstrate different responses after stereotactic radiosurgery (SRS), commonly including a transient loss of internal enhancement on postcontrast T1-weighted MRI thought to be due to an early reduction in tumor vascularity. We used dynamic contrast-enhanced based golden-angle radial sparse parallel (GRASP) MRI to characterize the vascular permeability changes underlying this phenomenon, with correlations to long-term tumor regression.
Methods: Consecutive patients with vestibular schwannoma who underwent SRS between 2017 and 2019, had a transient loss of enhancement after SRS, and had long-term longitudinal GRASP studies (6, 18, and 30 months) were included in this retrospective cohort analysis (n = 19).
Achondroplasia is the most common skeletal dysplasia. With the development of new growth-promoting drug treatment for children and adolescents with achondroplasia, multidisciplinary care has become increasingly more important. In addition to orthopedic care, a specialized team comprised of pediatrics/endocrinology, radiology, neurosurgery, otorhinolaryngology, anesthesiology, physiotherapy, psychology and other disciplines is necessary to develop and implement a holistic concept to improve the quality of life for individuals affected by achondroplasia.
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- A new approach for real-time volumetric dynamic MRI of the wrist joint is introduced, aimed at improving the evaluation of wrist instability by tracking carpal bone motion during active movement.
- The study utilized a specialized wrist coil and 3D-printed support platform to capture high-quality 2D images, which were then assembled into dynamic 3D volumes for analysis.
- Results showed that the method provided high signal-to-noise ratio and accurate visualization of carpal bones, paving the way for advanced segmentation and quantitative assessment of wrist kinematics.
Environmental monitoring of alpha-emitting radionuclides is crucial for assessing the long-term impacts of nuclear activities and understanding ecosystem dynamics. Thus, long-term marine environmental monitoring needs a precise analytical method for determining isotopes in sediment and soil samples. Because Am is the first decay product of Pu, its activity in the environment will grow during the next 50 years.
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