This page is part of the FHIR Specification (v0.0.82: DSTU 1). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions 

This is a value set defined by the FHIR project.
Summary
| Code System URL: | http://hl7.org/fhir/modality |
| Value Set URL: | http://hl7.org/fhir/vs/modality |
| Definition: | Type of data in the instance |
Formal value Set definition : XML or JSON.
This is a value set with codes taken from http://nema.org/dicom/dcid:
Type of data in the instance
Copyright Statement: These codes are excerpted from Digital Imaging and Communications in Medicine (DICOM) Standard, Part 16: Content Mapping Resource, Copyright 2011 by the National Electrical Manufacturers Association
This value set includes codes defined in other code systems, using the following rules:
| Code | Display | Definition |
| AR | Autorefraction | Autorefraction device |
| AU | Audio | Audio object |
| BDUS | Ultrasound Bone Densitometry | Ultrasound Bone Densitometry (modality) |
| BI | Biomagnetic imaging | Biomagnetic imaging device |
| BMD | Bone Mineral Densitometry | Bone Mineral Densitometry by X-Ray (modality), including dual-energy X-Ray absorptiometry (DXA) and morphometric X-Ray absorptiometry (MXA) |
| CR | Computed Radiography | Computed Radiography device |
| CT | Computed Tomography | Computed Tomography device |
| DG | Diaphanography | Diaphanography device |
| DX | Digital Radiography | Digital Radiography device |
| ECG | Electrocardiography | Electrocardiography device |
| EPS | Cardiac Electrophysiology | Cardiac Electrophysiology device |
| ES | Endoscopy | Endoscopy device |
| GM | General Microscopy | General Microscopy device |
| HC | Hard Copy | Hard Copy |
| HD | Hemodynamic Waveform | Hemodynamic Waveform acquisition device |
| IO | Intra-oral Radiography | Intra-oral Radiography device |
| IVOCT | Intravascular Optical Coherence Tomography | Intravascular Optical Coherence Tomography device |
| IVUS | Intravascular Ultrasound | Intravascular Ultrasound device |
| KER | Keratometry | Keratometry device |
| KO | Key Object Selection | Key Object Selection object |
| LEN | Lensometry | Lensometry device |
| LS | Laser surface scan | Laser surface scan device |
| MG | Mammography | Mammography device |
| MR | Magnetic Resonance | Magnetic Resonance device |
| NM | Nuclear Medicine | Nuclear Medicine device |
| OAM | Ophthalmic Axial Measurements | Measurements of the axial length of the eye which are done by various devices |
| OCT | Optical Coherence Tomography | Modality device that uses an interferometric, non-invasive optical tomographic technique to image 2D slices and 3D volumes of tissue using visible and near visible frequencies. |
| OP | Ophthalmic photography | Ophthalmic photography modality |
| OPM | Ophthalmic Mapping | Modality device that measures corneal topography, corneal or retinal thickness, and other similar parameters that are typically displayed as maps. |
| OPT | Ophthalmic Tomography | Tomography of the eye acquired by a modality that is based on light and optical principles. Tomography based on other principles, such as ultrasound, is excluded. |
| OPV | Ophthalmic Visual Field | Modality device that measures visual fields and perform visual perimetry. |
| OT | Other Modality | Other Modality device |
| PR | Presentation State | Presentation State object |
| PT | Positron emission tomography | Positron emission tomography (PET) device |
| PX | Panoramic X-Ray | Panoramic X-Ray device |
| REG | Registration | Registration |
| RF | Radiofluoroscopy | Radiofluoroscopy device |
| RG | Radiographic imaging | Radiographic imaging (conventional film/screen) |
| RTDOSE | Radiotherapy Dose | Radiotherapy Dose |
| RTIMAGE | Radiotherapy Image | Radiotherapy Imaging device; includes portal imaging |
| RTPLAN | Radiotherapy Plan | Radiotherapy Plan |
| RTRECORD | Radiotherapy Treatment Record | Radiotherapy Treatment Record |
| RTSTRUCT | Radiotherapy Structure Set | Radiotherapy Structure Set |
| SEG | Segmentation | Segmentation |
| SM | Slide Microscopy | Slide Microscopy |
| SMR | Stereometric Relationship | Stereometric image pairing modality |
| SR | Structured Report Document | Structured Report Document |
| SRF | Subjective Refraction | Subjective Refraction device |
| TG | Thermography | Thermography device |
| US | Ultrasound | Ultrasound device |
| VA | Visual Acuity | Visual Acuity device |
| XA | X-Ray Angiography | X-Ray Angiography device |
| XC | External-camera Photography | External-camera Photography device |
These codes are used in the following places:
OIDs
| Code System URL: | 1.2.840.10008.6.1.811 |
| Value Set URL: | 2.16.840.1.113883.4.642.2.230 |
| Note: these OIDs are not used in FHIR, but may be used in v3, or OID based terminology systems | |
See the full registry of value sets defined as part of FHIR.
Explanation of the columns that may appear on this page:
| Level | A few code lists that FHIR defines are hierarchical - each code is assigned a level. In this scheme, some codes are under other codes, and imply that the code they are under also applies |
| Source | The source of the definition of the code (when the value set draws in codes defined elsewhere) |
| Code | The code (used as the code in the resource instance) |
| Display | The display (used in the display element of a Coding). If there is no display, implementers should not simply display the code, but map the concept into their application |
| Definition | An explanation of the meaning of the concept |
| Comments | Additional notes about how to use the code |
In addition, this page will include mappings to HL7 v2 or HL7 v3 code where these have been defined.