The PACS system is suitable for use in radiology departments and ultrasound departments in health centers, private hospitals, and public hospitals with Class II or below. It has powerful and simple functions, excellent performance, MPR (three-dimensional reconstruction), VR (volume reconstruction), and film printing functions, and can be deployed quickly.
The PACS system supports DR, CT, and magnetic resonance to provide DICOM services, and supports clinician workstations to provide reports and image browsing services. The system supports integration with HIS and physical examinations, obtains examination application forms from the other party's server, and pushes results, supporting secondary development.
1. What is CT three-dimensional imaging?
CT three-dimensional imaging refers to the application of computer software on a specific workstation to post-process the scanned data and then reconstruct an intuitive three-dimensional image, so it can be used to examine the following diseases:
1. CT angiography can be performed, which can better display the shape, direction and distribution of blood vessels, as well as the calcification of the wall. It can be used to examine the arterial rings at the base of the brain and the large blood vessels in the chest and abdomen.
2. Three-dimensional imaging can also be used to examine diseases of the nasal cavity, nasopharynx, and sinuses.
3. Determine diseases of the trachea, bronchi, stomach and intestines.
4. Three-dimensional reconstruction of organ surfaces can be used to examine bone and surrounding soft tissue diseases, and can also be used to examine organ tumors.
2. What can 3D CT detect?
Three-dimensional CT is a technology that undergoes computer post-processing after a plain CT scan. It is widely used in CT diagnosis work. Common application scenarios are the three-dimensional display of orthopedic diseases, vascular lesions, pulmonary nodule lesions, and dental lesions.
1. Orthopedic diseases: Three-dimensional CT is of great significance to fracture lesions, such as tibial plateau fractures, radial head fractures, spinal fractures, etc. It can three-dimensionally display the fine structure of the fracture site and guide clinical surgical treatment. At the same time, it is widely used for skeletal and muscle space-occupying lesions. The specific space-occupying lesions can be displayed from multiple angles and can simulate surgical resection and treatment;
2. Vascular lesions: Three-dimensional CT technology is particularly important for the display of blood vessels on CTA. After post-processing, it can clearly display the degree and location of vascular thrombus, lumen stenosis or occlusion, thereby guiding clinical work;
3. Pulmonary nodule disease: Pulmonary nodule disease is gradually increasing. Three-dimensional technology can display the relationship between nodules and surrounding structures, pleural traction, lesion morphology, bronchial obstruction and other fine structures, which can better characterize the disease;
4. Dental lesions: such as dental cysts, apical inflammation, dental space-occupying lesions, etc., can be clearly displayed through three-dimensional CT reconstruction to guide clinical treatment.
CT three-dimensional reconstruction obtains thin-slice data after scanning with a CT machine. After the data is transmitted to the post-processing workstation, imaging technicians use three-dimensional reconstruction software for post-processing to reconstruct sagittal, coronal and axial images suitable for the lesion. , which can better interpret the diseased area and facilitate the formulation of treatment plans.
3. The difference between three-dimensional CT and ordinary CT
The differences between three-dimensional CT and ordinary CT include the order of examination, the scope of examination and the side effects of examination. Both examinations have their own advantages and both involve certain radiation. However, if the patient does not have any special diseases, it is still recommended to give priority to ordinary CT examination.
1. Examination sequence: When illness is suspected, ordinary CT is usually done first. Ordinary CT can detect lesions such as brain tumors, cerebral hemorrhage, cerebral infarction and other changes, or the lungs can clearly show the fine texture of the lungs. When patients need further clarification of diagnosis, they can use three-dimensional CT, which can display the morphology of vascular lesions. Three-dimensional imaging is conducive to observing the relationship between lesions and surrounding tissues, such as three-dimensional imaging of the lungs. There is also a simulated bronchoscopy technology that can display the main lesions in the bronchus, so three-dimensional CT is more suitable for displaying tumor lesions;
2. Scope of examination: Three-dimensional CT is more comprehensive and more accurate. For example, when the head is hit and a comprehensive examination is performed in the hospital, three-dimensional CT is more diversified and can survey the skull in all directions, and every picture can be explored. The location of the injury is very precise. If the fracture is not very serious at this time and there is no reduction treatment, the bone will still leave traces after healing, and ordinary CT can also detect it at this time;
3. Examination side effects: Ordinary CT scans are usually plain scans without contrast agents, which can reduce the risk of allergies. Three-dimensional CT requires the injection of contrast media, which carries certain risks. Some patients may be allergic to contrast media, such as rashes, fever, etc., so a skin test is required before injecting contrast media.
4. The difference between three-dimensional CT and enhanced CT
Three-dimensional CT examination is a technology that performs computer processing after CT examination, while enhanced CT is an examination method that scans images after injecting a contrast agent intravenously. The two are different in nature. CT examinations include ordinary CT plain scans and enhanced CT examinations. Three-dimensional CT reconstruction can be completed in both types of examinations. Three-dimensional CT and enhanced CT cannot be compared horizontally.
1. Three-dimensional CT: Thin-layer data are obtained after CT scanning, and the data are transmitted to the post-processing workstation, and technicians use three-dimensional reconstruction software for post-processing. It is commonly used clinically for three-dimensional display of orthopedic diseases, three-dimensional display of blood vessel CTA, three-dimensional display of pulmonary nodule lesions, three-dimensional display of dental diseases, etc., such as rib fractures, upper femoral space-occupying lesions, lower limb vascular abnormalities, maxillary cysts, etc. Basically, three-dimensional CT can display the lesion and surrounding structures, tissues and other conditions in multiple directions, which facilitates professional medical staff to diagnose the disease and provide important reference for the formulation of treatment plans;
2. Enhanced CT: Generally, when the nature of the lesion is unclear on plain CT examination, further enhanced CT examination is needed to assist in diagnosis. Enhanced CT examination can determine the condition of the lesion and surrounding blood supply, and is important for the preliminary diagnosis of benign and malignant lesions. Enhancement agents need to be injected before a contrast-enhanced CT examination. If you have severe renal insufficiency, or are sensitive or allergic to the components of the enhancement agent, you can follow your doctor's advice and use other examination methods instead to avoid increasing the burden on the kidneys or causing allergic symptoms. .
5. Introduction to PACS functions
(1) Application and appointment registration
·Supports card swiping to obtain patient information from the HIS system, and supports magnetic cards, IC cards, barcode input, and manual input.
·Supports electronic application forms and scanned paper application forms.
·Has charge management function.
·Supports printing of reservation application forms and barcodes.
·Support voice queuing for number calling.
(2) Image collection
·Acquire images in a variety of ways, supporting various standard and non-standard digital or analog video interface image formats.
·Standard DICOM image acquisition function
·Non-standard DICOM image acquisition function
·Video capture function
(3) Image storage
Before image storage, the system uses advanced image compression technology to compress medical images. It supports various storage methods such as disk library and optical disk library. The system adopts dual-machine backup, off-site backup, firewall and other security systems to ensure data safety and reliability.
(4) Analyze diagnostic reports
· Provides professional and rich diagnostic templates, which can be added, modified, and deleted by doctors, and usage permissions can be set for exclusive or public use by doctors;
·Supports customized report styles and mixed graphics and text;
·The report supports multi-level doctor review and typical case management;
·What you see is what you get in the report, and supports automatic scaling of report printing.
(5)Image processing
·Support high-definition vertical screen display;
·The window width and window level can be preset and the window level can be continuously adjusted by dragging the mouse on the image;
·Provide positioning map and positioning line browsing modes;
·Display images of patients in different positions and different equipment on the same screen for diagnostic comparison;
·Image roaming, stepless zoom, partial magnification; CT value coordinate display;
·Provide image annotation, angle, area and other measurements, and support bone density measurement;
·Provide film printing function and output in various image arrangements and image combinations.
(6) Statistical analysis
The statistical report integrates multiple statistical functions, such as: patient statistics table, doctor workload statistics table, and instrument information statistics table.
(7) Image post-processing and reconstruction
·MPR\CPR (three-dimensional multi-plane reconstruction)
·VRT (3D volume reconstruction)
·SSD (3D surface reconstruction)
·VE (virtual endoscopy)
·MIP (Maximum Intensity Projection), MinIP (Minimum Intensity Projection)
·CalSCore (cardiac image coronary calcium score)
6. Characteristics of PACS system
·Comprehensive PACS/RIS enables processing of different devices and different image information.
·A variety of clinical tool kits, which can perform various enhancement processing, measurement, and annotation on images, giving full play to the characteristics of electronic film.
·Supports WORKLIST function to automate workflow.
·Effectively solve the problem of large-capacity image storage and support multiple storage methods and multiple backup methods.
·Reports have multiple modes and custom styles.
·Integrated 3D image post-processing function.
·Open architecture, fully compliant with DICOM3.0 standard, providing HL7 standard interface, enabling data communication with HIS systems and other medical information systems that provide corresponding standard interfaces.
