Revisiting right anterior oblique projections for the triangle of Koch: implications from computed tomography

Radiographic assessment of the temporomandibular joint in the domestic cat using conventional radiographic views can be challenging due to superimposition of overlying structures and the complex anatomy of the skull. The use of computed tomography, magnetic resonance imaging, and cone beam computed tomography to assess the temporomandibular joint in the cat has increased, but these modalities are not always available in general veterinary practices. Conventional radiography is still commonly used for first line assessment of the temporomandibular joint. The aim of this preliminary study was to determine optimal angle of obliquity of lateroventral-laterodorsal and laterorostral-laterocaudal (nose up lateral oblique) oblique radiographic views in the assessment of the temporomandibular joints in five feline mesaticephalic dry skulls. Visibility of the mandibular head, mandibular fossa, retroarticular process, and temporomandibular joint space were evaluated and scored by two veterinary radiologists. The results of this study identified that the dependent temporomandibular joint anatomy was best seen on the latero-10°-ventral-laterodorsal, latero-15°-ventral-laterodorsal, and latero-20°-ventral-laterodorsal, oblique views, and opposite lateral oblique views at these angulations may be helpful in characterization of this anatomy in clinical patients. The results also indicate that the laterorostral-laterocaudal (nose up lateral oblique) oblique view did not allow adequate discrimination of all TMJ anatomy at any angle, and is not recommended.

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MANAGEMENT OF LATERAL HUMERAL CONDYLAR FRACTURE IN CHILDREN

Russian Journal of Pediatric Surgery, Anesthesia and Intensive Care ◽

10.30946/2219-4061-2019-9-1-62-69 ◽

2019 ◽

Vol 9 (1) ◽

pp. 62-69

Author(s):

A. I. Dorokhin ◽

H. G. Bagomedov

Keyword(s):

Computed Tomography ◽

Treatment Method ◽

Bone Fragment ◽

Condylar Fracture ◽

Treatment Experience ◽

Oblique Projections ◽

Condyle Fracture ◽

Humeral Condyle ◽

Suggested Classification ◽

Selection Of

Analysis of literature related to treatment of children with humeral condyle fracture (HCF) showed that in 15–51% of cases the outcomes were unsatisfactory. Material and methods. Treatment experience of 486 children with acute HCF fractures aged 1 to 16 years is presented. The diagnostic uses additional oblique projections and computed tomography to detect the degree of dislocation and fragment mobility alongside with standard ultrasound examinations. Patients were distributed as follows considering the degree of HCF bone fragment dislocation: 170 (35%) patients with 1 degree of dislocation and 117 (24%) patients with 2 degree of dislocation, whereas 199 (41%) patients had 3 degree dislocation. Results. The patients were operated using the developed tactical scheme based on the suggested classification. It took into account both the degree of dislocation and fragment mobility in 1 degree fractures. Remote results were examined in 321 (66%) patients within 1–15 years after the trauma: the results were excellent in 278 (87%) cases, good in 29 (%) cases and satisfactory in 13 (4%) cases. Conclusions. Treatment of children with humeral condyle fractures was based on the differentiated approach to selection of treatment method depending on dislocation degree and mobility of a distal bone fragment.

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X-ray microtomography

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100107058 ◽

1988 ◽

Vol 46 ◽

pp. 998-999

Author(s):

H.W. Deckman ◽

B.F. Flannery ◽

J.H. Dunsmuir ◽

K.D' Amico

Keyword(s):

Computed Tomography ◽

Internal Structure ◽

Imaging Technique ◽

Three Dimensional ◽

Tissue Structure ◽

Individual Element ◽

X Ray ◽

Non Invasive ◽

Panoramic Imaging ◽

Three Dimensional Images

We have developed a new X-ray microscope which produces complete three dimensional images of samples. The microscope operates by performing X-ray tomography with unprecedented resolution. Tomography is a non-invasive imaging technique that creates maps of the internal structure of samples from measurement of the attenuation of penetrating radiation. As conventionally practiced in medical Computed Tomography (CT), radiologists produce maps of bone and tissue structure in several planar sections that reveal features with 1mm resolution and 1% contrast. Microtomography extends the capability of CT in several ways. First, the resolution which approaches one micron, is one thousand times higher than that of the medical CT. Second, our approach acquires and analyses the data in a panoramic imaging format that directly produces three-dimensional maps in a series of contiguous stacked planes. Typical maps available today consist of three hundred planar sections each containing 512x512 pixels. Finally, and perhaps of most import scientifically, microtomography using a synchrotron X-ray source, allows us to generate maps of individual element.

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