PACS Submits IPO Prospectus: Revolutionizing Medical Imaging with Digital Archiving and Communication

What Is PACS
Picture Archiving and Communication System (PACS) is a medical imaging technology that leverages modern computer and communication technologies to replace traditional film with digital formats for image processing. It provides efficient and cost-effective storage, management, transmission, and display of medical images and patient case information, thereby offering image storage and access capabilities.

Its primary task is to store the vast volume of medical images generated daily by hospital radiology departments in digital format, enabling rapid retrieval and use under appropriate authorization when needed, while also incorporating auxiliary diagnostic management functions. Both digital images and diagnostic reports can be transmitted via PACS, thereby eliminating the cumbersome processes of manual archiving, retrieval, and physical film handling. The universal format used for image storage and transmission in PACS is the DICOM standard (Digital Imaging and Communications in Medicine).

PACS primarily comprises four components: imaging modalities such as X-ray, plain film (PF), computed tomography (CT), and magnetic resonance imaging (MRI). Integrated with emerging network technologies, PACS enables timely and efficient access to images, related materials, and data. It overcomes the physical and temporal constraints of traditional film-based image retrieval, distribution, and presentation. As a comprehensive application system, it integrates image acquisition, transmission, storage, and management; diagnostic image query and report management; and comprehensive information management.

A Brief History of PACS Development
In 1981, cardiovascular radiologist Andre Duerinckx first used the term PACS; in 1982, PACS principles were discussed for the first time at a radiologists’ conference. Also in 1982, the first large-scale PACS was installed at the University of Kansas, providing valuable lessons for subsequent installations and expansions of such systems. In the 1990s, Harold Glass, a medical physicist in London, leveraged government funding to launch the first filmless healthcare project at Hammersmith Hospital in London. Although he did not live to see the project’s official launch, he is widely recognized as one of the pioneers of PACS.

Architecture of PACS
A typical PACS system consists of numerous devices and software programs. It begins with imaging modalities, such as CT, ultrasound, nuclear medicine scanners, and MRI systems. The acquired images are then transmitted to a Quality Assurance (QA) workstation. The QA workstation serves as a checkpoint to verify the accuracy of patient data and key image attributes. Once the information is confirmed to be correct, the images are stored via an archiving system. The core storage devices are capable of retaining patients’ medical images, diagnostic reports, examination data, and other image-related information.

The second step in the PACS workflow is the reading workstation, which assists radiologists in reviewing patients’ imaging data and issuing final diagnostic reports. An increasing number of PACS systems employ network interfaces, such as VPN or SSL, as their communication mechanisms. PACS image backup is a critically important yet often overlooked component. To prevent loss of patient imaging data, HIPAA mandates that backup copies be maintained and automatically transmitted to off-site, independent computers for secure storage.

ItsandDICOMare closely related. In simple terms, DICOM is the foundation of PACS; in addition to DICOM, PACS also encompasses storage, databases, security, and other components.

Applications and Advantages of PACS
Many major medical imaging equipment manufacturers, internet healthcare companies, and independent software development firms offer PACS systems, and the software for these systems is available free of charge online. PACS systems primarily serve four purposes:

(1) Replacing Hard Copies
PACS systems have replaced traditional hard-copy image management systems, such as film archiving, thereby preventing the loss or damage of films during transit and becoming a modernized management tool for hospitals. With the continuous decline in the cost of digital electronic storage, PACS systems offer even more pronounced advantages in terms of cost and space, in addition to providing timely access to medical images.
(2) Remote Access
PACS systems offer greater possibilities for remote access and reporting (e.g., tele-education, telemedicine). They enable physicians to simultaneously access the same information from different geographic locations, overcoming temporal and spatial constraints, thereby allowing healthcare professionals to provide timely diagnosis, treatment, and care to various types of patients.
(3) Electronic Image Integration Platform
PACS provides an electronic platform for radiological imaging and other automated healthcare systems, such as the Hospital Information System (HIS), Electronic Medical Record (EMR), and Radiology Information System (RIS).
(4) Radiology Workflow Management
PACS systems can be used to assist radiology staff in managing patient examinations.

PACS in China
Since the issuance of the "Opinions of the CPC Central Committee and the State Council on Deepening the Reform of the Medical and Health Care System" in 2009, China has fully launched its medical informatization construction. In 2010, the central government allocated a special fund of RMB 3.9 billion for health informatization. Regions such as Shanghai and Zhejiang took the lead in launching pilot projects for primary healthcare information systems, including electronic health records (EHR) and electronic medical records (EMR).Since its inception in 2000, Picture Archiving and Communication Systems (PACS) have become basically ubiquitous in Grade A tertiary hospitals in first-tier cities like Beijing, Shanghai, and Guangzhou. The next stage of development focuses on specialization and hospital-wide adoption. In second-tier cities, the penetration rate in tertiary hospitals remains low, at approximately 50%, making these areas a key target market for mainstream PACS vendors in the coming years. The implementation of PACS in county-level hospitals in 2011 marked their initial widespread adoption, serving to kickstart the market and promote application; this sector is expected to attract increased funding in the near future.Future trends in PACS development will concentrate on two main areas: first, regional PACS applications centered on regional healthcare within the context of medical reform; and second, specialized PACS solutions—such as cardiac PACS, ultrasound PACS, ophthalmology PACS, and dental PACS—developed based on the segmentation of medical services.

Author: Liu Nan

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