With medical imaging usage increasing over the last 25 years, reducing the patient's exposure to X-ray doses has been a top priority of the medical imaging community for several years. The technology of JSB allows its dosage to be 6 to 9 times less than CR system and more than 100 times below that of a 3D CT scan because JSB detector's automatic gain, control, paired with its ability to reject scattered X-rays, gives radically enhanced image contrast performance at a very reduced dose. Only JSB can produce such an image at such doses, bringing the ALARA (As Low As Reasonably Achievable) principles to levels never met before.
JSB people are not satisfied with the current state-of-the-art with regards to radiation safety in the field of X-ray imaging in particular and ionizing radiation based imaging systems in general. The effects of ionizing radiation on the environment and human health today are unnecessarily destructive. When developing new products and devices, JSB relies on safe, innovative technology that allows for reduction of the radiation dose utilized and thus the harmful effects of medical X-radiation on the patient. The utilization of these innovative methods provides a drastic reduction in the radiation exposure to both patient and staff while maintaining the high diagnostic quality of the digital X-ray image that medical X-ray imaging demands. These reductions in radiation profile are often greater than ten fold and provide for the creation of a new radiation safety standard.
A new study suggests that a drug is currently under development to protect cells from the damaging effects of radiation exposure. The new developmental drug assists mitochondria in combating irradiation-induced cell death. But currently, no drugs on the market counteract the effects of radiation exposure. In this respect, DDR Inventor-V is very beneficial since its effective exposure time is shorter than that of other radiography systems. That means low noise characteristics of detector and application of scanning method make a result of low radiation dose to patients.
We believe that all radiologists should always try to limit the radiation dose to our patients as much as possible. DDR Inventor-V will decrease radiation exposure and will streamline the workflow for technologists.
The difference between the scanning time and exposure time in the scanning systems is as follows. The exposure time in X-ray systems (both film and digital) characerizes the time of exposure (influence time) of the patient to the X-ray radiation for obtaining a high-quality X-ray image. The exposure time depends on the receiver sensitivity, kind of examination, radiation parameters and is from units up to hundreds milliseconds. In turn, the scanning time characterizes the time of passing over the selected (by means of the collimator) area of (scanning this area by) a very narrow fan-like X-ray beam. So patient is exposed to radiation layer-by-layer, as against the traditional radiography, where the patient is exposed to a wide beam acting simultanously upon the whole selected area.
Many clients and end-users wonder why the patient exposure dose in digital X-ray scanning system is lower than in other types of digital X-ray systems. The lower patient exposure dose is conditioned by high sensitivity of the X-ray image receiver, absense of anti-scattering grid, short time of an effective exposure of the patient.
Dosage is quite a sensitive matter and the primary reason why pregnant women and children are only X-rayed under strict conditions. With the JSB machine the danger of an overdose is taken away and both children and pregnant women could be X-rayed without concern.
Most innovative, JSB's DR system's radiation dose is about 1/3 to 1/5 of that of existing film-type or other DRs in general chest imaging. And recently, the ratio has been lowered up to 1/10 with the help of efficiency improvement of its detector. This is according to the study: Comparison of Radiation Dose of DDR Inventor-V to CR & DR in Long Bone and Spot Scanogram Imaging at 41st the Annual Meeting of Korean Radiological Technologists Association.
JSB has a novel medical imaging technique that allows long bone imaging of patients using radiation doses up to 80% lower than those required for a standard CR (computed radiography) X-ray. JSB is a revolutionary solution to reduce irradiation linked to radiological investigations, which has risen by 600% over the past 20 years. The benefits of JSB DR are particularly important in pediatrics, because children undergo X-rays throughout their development, when their organs are highly susceptible to ionizing radiation. JSB DR is also significantly beneficial in adults who do not wish to be exposed to ionizing radiation during standard X-rays or CT scans.
Monday, 29 November 2010
Pediatric Patient Radiography
Unique linear slot-scanning X-ray technology
* Highly focused fan beam that effectively eliminates large X-ray doses
* The user can effectively control the actual dose administered to a child
* Adjustable: scan speed, digital resolution and X-ray technical parameters
* Paediatric imaging can be fully customized to fit the diagnostic requirements
* Paediatric imaging specialists can individually control and administer only the lowest possible dose required to achieve the highest quality results needed.
* The ability to create images using a very short effective exposure time.
* Highly focused fan beam that effectively eliminates large X-ray doses
* The user can effectively control the actual dose administered to a child
* Adjustable: scan speed, digital resolution and X-ray technical parameters
* Paediatric imaging can be fully customized to fit the diagnostic requirements
* Paediatric imaging specialists can individually control and administer only the lowest possible dose required to achieve the highest quality results needed.
* The ability to create images using a very short effective exposure time.
Low Radiation Dose
1) DDR Inventor-V scanning method ensures shorter exposure times than other radiography systems.
2) Low noise characteristics of the detector combine with unique scanning method to reduce radiation dose to patients.
3) Exposure time is effectively defined by the time of passing of the narrow beam over the selected tissues.
4) The highly focused beam effectively eliminates large area X-ray doses, so reducing radiation exposure risk to patients and to staff.
5) Patient is exposed to radiatioon layer-by-layer, as against the traditional radiography techniques where a wide beam acts simultaneously on the entire anatomical area.
6) The combinations of high sensitivity detector, narrow fan beam, absence of anti-scatter grid and short effective exposure time serve to lower patient exposure dose levels.
7) With JSB Medics DDR scanning system, the lower levels of radiation allow careful reconsideration of safe procedures for children and pregnant women.
2) Low noise characteristics of the detector combine with unique scanning method to reduce radiation dose to patients.
3) Exposure time is effectively defined by the time of passing of the narrow beam over the selected tissues.
4) The highly focused beam effectively eliminates large area X-ray doses, so reducing radiation exposure risk to patients and to staff.
5) Patient is exposed to radiatioon layer-by-layer, as against the traditional radiography techniques where a wide beam acts simultaneously on the entire anatomical area.
6) The combinations of high sensitivity detector, narrow fan beam, absence of anti-scatter grid and short effective exposure time serve to lower patient exposure dose levels.
7) With JSB Medics DDR scanning system, the lower levels of radiation allow careful reconsideration of safe procedures for children and pregnant women.
Software
DR-Works, based on DICOM, is completely compatible with HIS(Hospital Information System). The hospitals even without PACS can manage patient information and images independently with its own viewer and database.
Operating software DR-Works, which was developed considering convenience of users, has compatibility with hospital information system (HIS) or PACS by keeping DICOM protocol. In addition, medium and small hospitals also can manage patient information, inspection and image information with DR-Works by the viewer and database.
Operating software DR-Works, which was developed considering convenience of users, has compatibility with hospital information system (HIS) or PACS by keeping DICOM protocol. In addition, medium and small hospitals also can manage patient information, inspection and image information with DR-Works by the viewer and database.
MIC Detector
Digital radiography system, DDR Inventor-V, adopts MIC(Multi-channel Ionization Chamber) detector which has intrinsic features of hig efficiency by direct conversion of incident X-ray to electric signal, high fill factor without dead zone and without dead pixel and adopts scanning system which can prevent scattered radiation with fan beam. These characteristics of MIC detector provide merit of high image quality with low dose irradiation against patient.
Most of the digital radiography systems which are based on charge-coupled device(CCD) and amorphous silicon (a-Si) are indirect conversion type that uses scintillator to convert incident X-ray into visible light. That is, they need two-step process to get electronic signal for digital image and that image quality is significantly affected by scintillator. On the other hand, MIC detector is direct conversion type. The X-ray irradiation which passed through the patient penetrates into the space between the electrodes. And the gas in the chamber is ionized to generate charges on the corresponding electrodes. The induced charges are read directly by electronics.
Fill factor is the ratio of the sensitive area of the pixel to the effective area of the detector element itself. If the fill factor is small, light photons from a part of incident X-rays may never be recorded. MIC detector has no loss of effective sensing area because most of all ions are captured between the electrodes. Above all, MIC detector has nearly no dead pixel by its intrinsic characteristics.
The MIC detector has strong durability on operating such as surrounding temperature, humidity, vibration and treatment. This feature provides users with benefit on the maintenance for economic operation. Also, JSB can provide a full-coverage of customer service in short time, since it has its own technology on core parts and keeps sufficient inventory.
DQE is the measure of the combined effect of the noise and contrast performance of an imaging system. The detector with high DQE provides high quality image and potential advantage of low radiation dose. DQE of MIC detector is as high as about 50% at 2.5 lp/mm.
Most of the digital radiography systems which are based on charge-coupled device(CCD) and amorphous silicon (a-Si) are indirect conversion type that uses scintillator to convert incident X-ray into visible light. That is, they need two-step process to get electronic signal for digital image and that image quality is significantly affected by scintillator. On the other hand, MIC detector is direct conversion type. The X-ray irradiation which passed through the patient penetrates into the space between the electrodes. And the gas in the chamber is ionized to generate charges on the corresponding electrodes. The induced charges are read directly by electronics.
Fill factor is the ratio of the sensitive area of the pixel to the effective area of the detector element itself. If the fill factor is small, light photons from a part of incident X-rays may never be recorded. MIC detector has no loss of effective sensing area because most of all ions are captured between the electrodes. Above all, MIC detector has nearly no dead pixel by its intrinsic characteristics.
The MIC detector has strong durability on operating such as surrounding temperature, humidity, vibration and treatment. This feature provides users with benefit on the maintenance for economic operation. Also, JSB can provide a full-coverage of customer service in short time, since it has its own technology on core parts and keeps sufficient inventory.
DQE is the measure of the combined effect of the noise and contrast performance of an imaging system. The detector with high DQE provides high quality image and potential advantage of low radiation dose. DQE of MIC detector is as high as about 50% at 2.5 lp/mm.
Grid
Some clients want to know whether the use of the anti-scattering grid in the scanning systems is required. The scattered radiation is deflected and does not get on the sensitive area of the X-ray sensitive detector, because the X-ray image receiver is a very narrow linear array X-ray sensitive detector.
Vascular Pulsations
Many clients are worried that the vascular pulsations caused by the hearbeats might affect the quality and diagnostic capabilities of the digital X-ray image. This is not the case. Because the scanning time is short, the exposure time does not exceed 10 miliseconds. It is confirmed by the experience of examination of many patients.
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