Patent Application
20130236677
The present invention relates to a method of manufacturing a detector, in particular to a method of manufacturing a flat panel detector of a medical imaging diagnostic device.
The flat panel detector is an important component of an X-ray detector and is relatively expensive. During assembling, bad pixels usually appear in the flat panel detector due to Electrostatic Discharge (ESD), and the performance of the flat panel detector also degrades during the use thereof. Such flat panel detectors can be repaired with a laser. Replacement and repair of the flat panel detector, namely, using a reusable flat panel detector, can save on the production cost of the X-ray detector. There are two ways available at present for bonding the flat panel detector. One method of making the flat panel detector reusable is adhering the four sides of the flat panel detector to the panel detector support using the Room Temperature Vulcanized Silicone Rubber (which is referred to as “the RTV adhering method” for short). The problem with this method is that the RTV at the edge of the flat panel detector and the foam under the flat panel detector make the edge and the middle part of the flat panel detector have different a strength and stiffness, resulting in non-uniform weight distribution on the surface of the flat panel detector, thus making the flat panel detector very fragile. Another method is bonding the entire surface of the flat panel detector on the panel detector support (which is referred to as the “entire surface bonding method”), but the flat panel detector bonded in this way cannot be reused once it is damaged.
U.S. Pat. Nos. 7,396,159, 7,244,945, and 6,847,041 each disclose some ways of bonding the flat panel detector on the panel detector support.
With respect to the above problem, in one aspect, a method of manufacturing a detector is provided. The method includes bonding the flat panel detector and the panel detector support using a removable double-faced adhesive film.
In one embodiment, the removable double-faced adhesive film is adhered between the planes of the flat panel detector and the panel detector support and is removed immediately after the adhering, or is removed after a period of time.
The adhesive film is removed by pulling forcibly the end thereof, and the pulling may be performing using tools or control methods.
In one embodiment, the removable double-faced adhesive film is adhered to the four sides of the flat panel detector.
In one embodiment, the removable double-faced adhesive film is adhered to the entire surface of the flat panel detector.
In one embodiment, the removable double-faced adhesive film is arranged to be diverging from the center of the flat panel detector to its surroundings, and ends of the adhesive films are left at outside of the surface of the flat panel detector, so that the adhesive films are removed by pulling the ends thereof.
In one embodiment, the removable double-faced adhesive film is in a strip spiral arrangement.
In one embodiment, the removable double-faced adhesive film is arranged in such a way that the surface of the flat panel detector is divided into four triangular areas by two crossing diagonals, the strip adhesive films connecting end to end in succession in each area.
In one embodiment, the removable double-faced adhesive film is an optical adhesive film with a thickness of 100-200 microns.
In one embodiment, a layer of black glass priming paint is added at the backside of the flat panel detector.
The embodiments described herein utilize a removable double-faced adhesive film to bond the flat panel detector, so that the flat panel detector can be easily removed after being bonded. The assembly method described herein has both the advantages of high firmness and reliability as in the original entire surface bonding method, and overcomes the defect that the flat panel detector cannot be repaired or reused. By means of the assembling method described herein, the flat panel detector can be easily removed or repaired, thus greatly reducing the manufacturing cost. In addition, by means of the assembling method described herein, the weight distribution on the surface of the flat panel detector is uniform, and the panel detector support can more effectively support the flat panel detector, thereby improving the reliability of the flat panel detector.
Systems and methods will be described in further detail below through specific embodiments, but are not limited to the specific embodiments described herein.
The specific embodiments are described in detail below in conjunction with the drawings, but these embodiments are not intended to be limiting. The same components in different drawings are denoted by the same reference signs.
A plurality of possible arrangements of adhesive films may be used. For example,
In
In
Both of the two entire surface adhering methods shown in
If the adhesive film arrangement is in a diverging shape and non-uniform, since the adhesive film 3 is in the light-transmissive area behind the flat panel detector 2, the air bubbles or edge imprints generated during the adhering process may appear in the images, and may lead the doctors to a misdiagnosis. Even if a gain calibration method is used during assembling of the flat panel detector 1, air bubbles or adhesive film edge imprints may still occur after a long time.
The manufacturing method of a detector as described herein can also be applied to manufacturing of other flat panel detectors (e.g. LCD) in addition to the manufacturing of the flat panel detector used for medical imaging diagnostic devices (e.g. X-ray imaging system, CT device).
The embodiments described above are only for illustration, and in no way limit the scope of the present invention. It shall be noted that those ordinarily skilled in the art will be able to make many improvements, modifications and variations to the present invention, and these improvements, modifications and variations, which are not departing from the spirit of the present invention, shall be considered as falling within the scope of the present application.
