Kenya National Cancer Control Programme (NCCP) FHIR Implementation Guide
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Kenya National Cancer Control Programme (NCCP) FHIR Implementation Guide, published by Digital Health Agency (DHA), Kenya. This guide is not an authorized publication; it is the continuous build for version 0.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/IntelliSOFT-Consulting/nccpFHIRIG/ and changes regularly. See the Directory of published versions

: Kenya Radiotherapy Target Volume Code System

Active as of 2026-06-04

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<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="rt-target-volume-cs"/>
  <language value="en"/>
  <text>
    <status value="generated"/>
    <div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: CodeSystem rt-target-volume-cs</b></p><a name="rt-target-volume-cs"> </a><a name="hcrt-target-volume-cs"> </a><p>This case-sensitive code system <code>https://nshr-uat.sha.go.ke/fhir/CodeSystem/rt-target-volume-cs</code> defines the following codes:</p><table class="codes"><tr><td style="white-space:nowrap"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td style="white-space:nowrap">GTV<a name="rt-target-volume-cs-GTV"> </a></td><td>GTV — Gross Tumour Volume</td><td>Macroscopic extent of tumour visible on imaging.</td></tr><tr><td style="white-space:nowrap">CTV<a name="rt-target-volume-cs-CTV"> </a></td><td>CTV — Clinical Target Volume</td><td>GTV plus margin for subclinical microscopic disease.</td></tr><tr><td style="white-space:nowrap">ITV<a name="rt-target-volume-cs-ITV"> </a></td><td>ITV — Internal Target Volume</td><td>CTV plus internal margin for organ motion.</td></tr><tr><td style="white-space:nowrap">PTV<a name="rt-target-volume-cs-PTV"> </a></td><td>PTV — Planning Target Volume</td><td>ITV plus set-up margin for treatment delivery uncertainty.</td></tr><tr><td style="white-space:nowrap">OAR<a name="rt-target-volume-cs-OAR"> </a></td><td>OAR — Organ at Risk</td><td>Normal tissue structure whose radiation tolerance limits the prescribed dose.</td></tr><tr><td style="white-space:nowrap">PRV<a name="rt-target-volume-cs-PRV"> </a></td><td>PRV — Planning Risk Volume</td><td>OAR plus margin for positioning uncertainty.</td></tr><tr><td style="white-space:nowrap">RVR<a name="rt-target-volume-cs-RVR"> </a></td><td>RVR — Remaining Volume at Risk</td><td>Volume outside GTV/CTV that receives dose.</td></tr><tr><td style="white-space:nowrap">BOOST<a name="rt-target-volume-cs-BOOST"> </a></td><td>Boost Volume</td><td>Sub-volume receiving a higher dose than the main treatment.</td></tr></table></div>
  </text>
  <url
       value="https://nshr-uat.sha.go.ke/fhir/CodeSystem/rt-target-volume-cs"/>
  <version value="0.1.0"/>
  <name value="RTTargetVolumeCS"/>
  <title value="Kenya Radiotherapy Target Volume Code System"/>
  <status value="active"/>
  <experimental value="false"/>
  <date value="2026-06-04T14:49:30+00:00"/>
  <publisher value="Digital Health Agency (DHA), Kenya"/>
  <contact>
    <name value="Digital Health Agency (DHA), Kenya"/>
    <telecom>
      <system value="url"/>
      <value value="https://dha.go.ke"/>
    </telecom>
    <telecom>
      <system value="email"/>
      <value value="info@dha.go.ke"/>
    </telecom>
  </contact>
  <contact>
    <name value="Digital Health Agency Kenya – FHIR Team"/>
    <telecom>
      <system value="email"/>
      <value value="info@dha.go.ke"/>
      <use value="work"/>
    </telecom>
    <telecom>
      <system value="url"/>
      <value value="https://dha.go.ke"/>
      <use value="work"/>
    </telecom>
  </contact>
  <description
               value="ICRU-defined target volume concepts used in radiotherapy planning."/>
  <jurisdiction>
    <coding>
      <system value="urn:iso:std:iso:3166"/>
      <code value="KE"/>
      <display value="Kenya"/>
    </coding>
  </jurisdiction>
  <caseSensitive value="true"/>
  <content value="complete"/>
  <count value="8"/>
  <concept>
    <code value="GTV"/>
    <display value="GTV — Gross Tumour Volume"/>
    <definition value="Macroscopic extent of tumour visible on imaging."/>
  </concept>
  <concept>
    <code value="CTV"/>
    <display value="CTV — Clinical Target Volume"/>
    <definition value="GTV plus margin for subclinical microscopic disease."/>
  </concept>
  <concept>
    <code value="ITV"/>
    <display value="ITV — Internal Target Volume"/>
    <definition value="CTV plus internal margin for organ motion."/>
  </concept>
  <concept>
    <code value="PTV"/>
    <display value="PTV — Planning Target Volume"/>
    <definition
                value="ITV plus set-up margin for treatment delivery uncertainty."/>
  </concept>
  <concept>
    <code value="OAR"/>
    <display value="OAR — Organ at Risk"/>
    <definition
                value="Normal tissue structure whose radiation tolerance limits the prescribed dose."/>
  </concept>
  <concept>
    <code value="PRV"/>
    <display value="PRV — Planning Risk Volume"/>
    <definition value="OAR plus margin for positioning uncertainty."/>
  </concept>
  <concept>
    <code value="RVR"/>
    <display value="RVR — Remaining Volume at Risk"/>
    <definition value="Volume outside GTV/CTV that receives dose."/>
  </concept>
  <concept>
    <code value="BOOST"/>
    <display value="Boost Volume"/>
    <definition
                value="Sub-volume receiving a higher dose than the main treatment."/>
  </concept>
</CodeSystem>