Medical Imaging System

Medical Imaging SystemMedical Imaging System

Ku-Yaw ChangKu-Yaw [email protected]@mail.dyu.edu.tw

Assistant Professor, Department of Assistant Professor, Department of Computer Science and Information EngineeringComputer Science and Information Engineering

Da-Yeh UniversityDa-Yeh University

222004/2/262004/2/26 An Introduction to Medical Imaging SystemAn Introduction to Medical Imaging System

OutlineOutline

BackgroundBackground

DICOMDICOM

PACSPACS



Digital diagnostic imaging modalitiesDigital diagnostic imaging modalities Computed tomography (CT) Computed tomography (CT) Magnetic resonance imaging (MRI)Magnetic resonance imaging (MRI) Positron emission tomography (PET)Positron emission tomography (PET) Single-photon emission computed Single-photon emission computed

tomography (SPECT)tomography (SPECT) Ultrasound (US)Ultrasound (US) Functional MRI (fMRI)Functional MRI (fMRI)



Structural/anatomical informationStructural/anatomical information CT, MRI and USCT, MRI and US

Functional informationFunctional information PET, SPECT, and fMRIPET, SPECT, and fMRI


CTCT


MRMR


USUS


PETPET


DICOMDICOM

DDigital igital IImaging and maging and COCOmmunications in mmunications in MMedicineedicine An evolving standard in digital medicineAn evolving standard in digital medicine

DICOMDICOM an image or file format an image or file format a networking protocola networking protocol

built on top of TCP/IPbuilt on top of TCP/IP

designed to store and transmit medical datadesigned to store and transmit medical data


DICOMDICOM

Official websiteOfficial website http://medical.nema.org/http://medical.nema.org/ http://www.dicom.org.tw/index.jsphttp://www.dicom.org.tw/index.jsp (Taiwan) (Taiwan)


Advantages (1)Advantages (1)

Universal standard of digital medicine. Universal standard of digital medicine. All current digital image acquisition devices All current digital image acquisition devices

produce DICOM images and work on DICOM produce DICOM images and work on DICOM networks.networks.



Excellent image quality.Excellent image quality. DICOM supports up to 65536 (16 bits) shades DICOM supports up to 65536 (16 bits) shades

of gray for the monochrome image display, of gray for the monochrome image display, still dominating many modalities. With this still dominating many modalities. With this respect, converting DICOM images into respect, converting DICOM images into JPEGs or bitmaps (with 256 shades of gray) JPEGs or bitmaps (with 256 shades of gray) makes them practically unusable for makes them practically unusable for diagnostic reading. On the other hand, diagnostic reading. On the other hand, DICOM does include various image-encoding DICOM does include various image-encoding formats, from basic bitmapped data to formats, from basic bitmapped data to wavelets.wavelets.



Full support for image-acquisition parameters.Full support for image-acquisition parameters. Not only does DICOM store the image pixels, but it Not only does DICOM store the image pixels, but it

also records a multitude of other image-related also records a multitude of other image-related parameters such as patient 3D position, physical parameters such as patient 3D position, physical sizes of the objects in the image, slice thickness, sizes of the objects in the image, slice thickness, image exposure parameters, etc. This data image exposure parameters, etc. This data enormously enriches the informational content of enormously enriches the informational content of DICOM images, and facilitates processing and DICOM images, and facilitates processing and interpreting the image data in various ways - for interpreting the image data in various ways - for instance, creating 3D images from the sequences of instance, creating 3D images from the sequences of 2D CT slices.2D CT slices.



Complete encoding of medical data.Complete encoding of medical data. DICOM files and messages use about 4000 DICOM files and messages use about 4000

standardized fields ("DICOM dictionary") to standardized fields ("DICOM dictionary") to convey various medical data - from patient convey various medical data - from patient name to image color depth to current patient name to image color depth to current patient diagnosis. This data is often essential for diagnosis. This data is often essential for correct diagnostics.correct diagnostics.


PACSPACS

PPicture icture AArchiving and rchiving and CCommunication ommunication SSystemsystems complete medical systems with all hardware and complete medical systems with all hardware and

software included, software included,

ComponentsComponents archiving servers (one or many, for online and deep archiving servers (one or many, for online and deep

storage) storage) diagnostic workstationsdiagnostic workstations digital image acquisition devicesdigital image acquisition devices

DICOM conformance statementDICOM conformance statement ensuring their conformance to the standard and ensuring their conformance to the standard and

interconnectivity.interconnectivity.


PACSPACS

Integrated withIntegrated with HIS: Hospital(Healthcare) Information System HIS: Hospital(Healthcare) Information System RIS: Radiology Information SystemRIS: Radiology Information System


marosisTM m-gatemarosisTM m-gate


Reference WebsiteReference Website

GE Medical SystemsGE Medical Systems http://www.gemedicalsystems.com/index.htmlhttp://www.gemedicalsystems.com/index.html

Fujitsu (Taiwan)Fujitsu (Taiwan) http://tw.fujitsu.com/http://tw.fujitsu.com/


See you next time!See you next time!

Medical Imaging System

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