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Association of posterior tibial tendon abnormalities with abnormal signal intensity in the sinus tarsi on MR imaging (2000)

Anderson, M. W. ; Kaplan, P. A. ; Dussault, R. G. ; [et al.]

Springer

Skeletal radiology 29 (2000), S. 514-519

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ISSN: 1432-2161

Keywords: Key words Ankle ; Foot ; Tendon ; Sinus tarsi

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Abstract Objective. To evaluate the association of abnormal signal intensity within the sinus tarsi with abnormalities of the posterior tibial tendon (PTT) on MR imaging. Design and patients. Sinus tarsi abnormalities were identified on 30 ankle MR examinations in 29 patients. The PTT and anterior talofibular ligament were retrospectively analyzed for abnormalities in these same patients. Results and conclusions. Tears of the anterior talofibular ligament were found in 13 of 30 (43%) ankles. PTT abnormalities (complete tear, partial tear or dislocation) were seen in 14 of 30 (47%) studies, and were distributed relatively equally between those patients with and without lateral ligament tears. Our results provide evidence of an association between abnormalities of the PTT and the sinus tarsi. The finding of abnormal signal intensity within the sinus tarsi on MR imaging should alert the radiologist to potential abnormalities of the PTT.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s002560000248

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In-Situ mechanistic studies of the reaction of trimethylgallium and phosphine in zeolite H-Y (1993)

Anderson, M. W. ; Logothetis, G. K. ; Pemble, M. E. ; [et al.]

New York, NY [u.a.] : Wiley-Blackwell

Advanced Materials for Optics and Electronics 2 (1993), S. 313-318

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ISSN: 1057-9257

Keywords: MOCVD ; MAS-NMR ; CARS ; Quantum effects ; Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Electrical Engineering, Measurement and Control Technology , Physics

Notes: Coherent anti-Stokes Raman scattering (CARS) has been utilised to monitor the decomposition of trimethylgallium (TMGa) on the reactive internal surface of the protonated form of zeolite Y under metal organic chemical vapour deposition (MOCVD) conditions designed to produce GaP deposits that exhibit quantum-size effects. The CARS data clearly reveal the facile room temperature decomposition of TMGa in the zeolite, as evidenced by the detection of increasing levels of methane with increasing reaction time. In addition, the zeolite samples were analysed by solid state nuclear magnetic resonance with magic angle spinning (MAS NMR) before reaction, after reaction of TMGa and after subsequent reaction with phosphine at 300°C. These data reveal that TMGa reacts with acid sites in the zeolite 12-rings, resulting in species containing methyl groups. Subsequent exposure to phosphine removes these methyl group protons, leaving various, as yet not fully characterised, phosphorus species. Exposure to phosphine does not appear to regenerate the acid sites on the zeolite.

Additional Material: 3 Ill.