Voice pathology classification based on High-Speed Videoendoscopy.

This work presents a method for automatical and objective classification of patients with healthy and pathological vocal fold vibration impairments using High-Speed Videoendoscopy of the larynx. We used an image segmentation and extraction of a novel set of numerical parameters describing the spatio-temporal dynamics of vocal folds to classification according to the normal and pathological cases and achieved 73,3% cross-validation classification accuracy. This approach is promising to develop an automatic diagnosis tool of voice disorders.

Automatic tracking of implanted fiducial markers in cone beam CT projection images.

PURPOSE: This paper describes a novel method for simultaneous intrafraction tracking of multiple fiducial markers. Although the proposed method is generic and can be adopted for a number of applications including fluoroscopy based patient position monitoring and gated radiotherapy, the tracking results presented in this paper are specific to tracking fiducial markers in a sequence of cone beam CT projection images. METHODS: The proposed method is accurate and robust thanks to utilizing the mean shift and random sampling principles, respectively. The performance of the proposed method was evaluated with qualitative and quantitative methods, using data from two pancreatic and one prostate cancer patients and a moving phantom. The ground truth, for quantitative evaluation, was calculated based on manual tracking preformed by three observers. RESULTS: The average dispersion of marker position error calculated from the tracking results for pancreas data (six markers tracked over 640 frames, 3840 marker identifications) was 0.25 mm (at iscoenter), compared with an average dispersion for the manual ground truth estimated at 0.22 mm. For prostate data (three markers tracked over 366 frames, 1098 marker identifications), the average error was 0.34 mm. The estimated tracking error in the pancreas data was < 1 mm (2 pixels) in 97.6% of cases where nearby image clutter was detected and in 100.0% of cases with no nearby image clutter. CONCLUSIONS: The proposed method has accuracy comparable to that of manual tracking and, in combination with the proposed batch postprocessing, superior robustness. Marker tracking in cone beam CT (CBCT) projections is useful for a variety of purposes, such as providing data for assessment of intrafraction motion, target tracking during rotational treatment delivery, motion correction of CBCT, and phase sorting for 4D CBCT.

Data processing tasks in wireless GI endoscopy: image-based capsule localization & navigation and video compression.

The paper addresses data processing support that is required in capsule gastrointestinal endoscopy. First, capsule position estimation method using standard MPEG-7 image features (descriptors) is discussed. The proposed approach makes use of vector quantization, principal component analysis and neural networks. Next, new algorithms dedicated for virtual colonoscopy (VC) human body inspection are described. The VC images can be registered with endoscopic ones and help in capsule localization and navigation. Finally, an original, low-complexity, efficient image compression method, based on integer-to-integer 4x4 DCT transform, is presented and experimentally verified.

[Obstruction of the small intestine caused by malignant lymphoma]. / Niedroznosc mechaniczna jelita cienkiego spowodowana chloniakiem zlosliwym.

Primary malignant tumors of the small intestine are a rare finding, not thought to be a likely case of intestinal obstruction. A case is reported of a patient presenting with chronic abdominal pain, apparently due to adhesions and a postoperative hernia (already after its repair). On laparotomy two tumors of the small, intestine were found obstructing its lumen, diagnosed histopathologically as primary malignant lymphoma.

[Comparison of combined treatment for venous ulcers in postphlebitic syndrome and use of PGE-1--introductory remarks]. / Porównanie skojarzonego leczenia owrzodzen podudzi w zespole pozakrzepowym z zastosowaniem prostaglandyny PGE-1--doniesieniewstepne.

We have included PGE-1 to the clinical management of varicose ulcers of the leg. We found the results very interesting and promising. The literature on using PGE-1 for this disease entity is rather poor and the biomechanics is still unclear.

[Coexistence of retrosternal goiter and mediastinal lipoma simulating mediastinal goiter]. / Wspóistnienie wola zamostkowego z tluszczakiem sródpiersia, imitujacym wole sródpiersiowe.

A female patient is reported in whom the preliminary diagnosis was mediastinal goitre. During the operation retrosternal goitre was found to be associated with mediastinal tumour diagnosed histologically as lipoma.