Quantitative measurement and analysis system for temporal-mandibular joint on magnetic resonance image

Abstract

The invention discloses a quantitative measurement and analysis system for temporal-mandibular joints on a magnetic resonance image. The system comprises the following steps: step 1, taking a condyle process maximum cross-section image in an MRI image as a measurement object, describing condyle process and mandibular ramus forms, selecting a most prominent point of the condyle process backwards and a most prominent point of the mandibular ramus backwards at the rear edge of the mandibular ramus, and connecting the two points to form a mandibular ramus trailing edge tangent line, namely a vertical reference line; and step 2, making a straight line perpendicular to the tangent line of the rear edge of the mandibular ramus to be tangent to the B-shaped incisura of the mandible, and determining a horizontal reference line. The system has the advantages that: a stable TMJ MRI measurement system can be established, the condylar process height can be effectively evaluated, comparison before and after treatment is carried out, and the treatment effect is evaluated; and the severity of the TMJ organic lesion can be evaluated by comprehensively evaluating the discoid-condylar distance, the joint discoid length and the condylar process height, so that formulation of a treatment scheme is guided, and the treatment effect is predicted.

Description

technical field [0001] The invention relates to the technical field of quantitative measurement and analysis of upper temporomandibular joints, in particular to a system for quantitative measurement and analysis of upper temporomandibular joints in magnetic resonance images. Background technique [0002] Magnetic resonance imaging (MRI) of the temporomandibular joint (TMJ) can effectively image the calcified and non-calcified tissues inside the joint at the same time, and is the most effective means to determine whether there is an abnormality in the internal structure of the joint; Radiation damage, so it is considered safer than T. TMJ MRI is also an indispensable measure in disease diagnosis, prognosis judgment and curative effect evaluation; and many patients do not need to undergo T examination during the diagnosis process. [0003] Therefore, it is very important to obtain quantitative TMJ evaluation indicators from MRI. During measurement, the setting of the referen...

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Problems solved by technology

[0005] like figure 1 As shown, the measurement system referenced by the condyle’s mental position is convenient for evaluating the height, width, positional relationship between the articular disc and the condyle, etc. Figure 2-3 As shown in , the size and distribution of the three inscribed circles are not stable, causing the reference system to tilt and shift, which will bring errors to the measurement

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