It's 2024 now, are you still worried about the safety of CT?
CT scans, a shining jewel of modern medical imaging, have long played an indispensable role in disease diagnosis. However, the radiation exposure associated with traditional CT scans once deterred many. With the continuous development of technologies like artificial intelligence and big data, these concerns are gradually dissipating.
How much harm does a CT scan do to the body?
Many people are most concerned about the harmful effects of CT scans, as they emit more ionizing radiation than standard X-rays. Ionizing radiation can damage certain macromolecules in the body, damaging cells and potentially harming the body. Furthermore, achieving a clearer view on a CT scan often requires increasing the radiation dose, which increases the patient's risk of radiation exposure. Furthermore, some people may experience adverse reactions to the contrast agents used in enhanced CT scans. However, as long as the dose is within the prescribed range, there's no need to worry!
By ensuring that the radiation dose to which the human body is exposed does not exceed the "safety line", the possibility of harm to human health will be greatly reduced.
Nowadays, with the emergence and development of new technologies,
CT scanning technology has also ushered in new breakthroughs.
While its imaging technology has been improved, it has also greatly alleviated people's anxiety.
CT Scan: The Evolving Eye
CT scanning is an important aid in modern disease diagnosis, and various innovative designs are constantly improving CT imaging technology.
Multiple detectors: In CT scanners, each detector is equipped with a scintillator, which emits visible light when struck by X-rays. Traditional CT scanners typically have a single detector arc, but modern devices can have multiple detector arcs, up to 256. This design enables the device to acquire multiple "slices" simultaneously, improving scanning efficiency and image quality.
High-performance analog-to-digital converters: To process large amounts of detector data, semiconductor companies are developing 128-channel analog-to-digital converters (ADCs). These ADC chips offer low power consumption, low noise, and up to 24-bit resolution. Using synchronized sample-and-hold circuitry, the ADCs acquire all samples simultaneously, ensuring the accuracy and integrity of image data.
Low-dose CT imaging technology: To alleviate patients' concerns and reduce radiation dose while maintaining image quality, the industry has been working hard to address this issue. In response, the scientific and technological community has developed several new technologies:
Spectral CT technology
By adjusting the intensity of the beam during the scan, radiologists can capture greater detail.
Double-layer detector
This technique absorbs X-ray photons of different energies in layers, revealing more details that penetrate objects.
Single-photon capture detection
Use semiconductor devices to directly count each X-ray photon, thereby reducing photon loss, and measure the energy of each photon.
Dual-source CT technology: Dual-source CT uses two X-ray sources and detector arrays installed at a 90-degree angle. This arrangement provides faster scanning speeds and higher temporal resolution, which can reduce motion artifacts and clearly image fast-moving features such as a beating heart.
High-resolution CT scanning: High-resolution CT scanners can produce ultra-thin slices less than 1 mm, using more and smaller detectors to improve spatial resolution. The sophisticated image reconstruction algorithms and enhanced X-ray beam management capabilities of these scanners result in even finer image quality and detail, making them particularly suitable for detecting tiny features and structures.
Despite rapid advancements in CT technology, trade-offs remain between patient safety and technological advancements. Avnet deeply understands the challenges of developing medical imaging products and has the resources to help OEMs address these challenges. By developing low-noise sampling and digitization circuits, or utilizing FPGA accelerator boards to increase image processing speed, future CT scanners will be able to achieve higher resolution at lower radiation doses, reduce the cost per scan, and improve overall reliability.
With the continuous advancement of science and technology, CT scanning technology is undergoing a revolutionary change, allowing us to say goodbye to radiation panic and enjoy a more comfortable and safer examination experience.
Interactive Topics
This week's interactive topic is: With the continuous development of technologies like artificial intelligence and big data, CT scanning technology is undergoing innovation. Let's discuss your thoughts on CT scanning.
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