Notes in 13 Radiation dosimetry

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Published	05/01/2023	Imaging Physics: Radiation Dosimetry{{c1::Computed tomography dose index (CTDI)}} is the average {{c2::phantom}} dose for a single {{c3::axi…
Published	05/01/2023	Imaging Physics: Radiation DosimetryDoes the computed tomography dose index (CTDI) include scatter?{{c1::Yes}}
Published	05/01/2023	Imaging Physics: Radiation DosimetryThe computed tomography dose index (CTDI) is measured in {{c1::Gy::units}}
Published	05/01/2023	Imaging Physics: Radiation DosimetryComputed tomography dose index (CTDI) is measured with {{c2::16 cm}} and {{c2::32 cm}} phantoms, wh…
Published	05/01/2023	Imaging Physics: Radiation Dosimetry{{c1::weighted computed tomography dose index (CTDIweighted)}} = {{c2::2/3 CTDIp + 1/3 CTDIc::equat…
Published	05/01/2023	Imaging Physics: Radiation Dosimetry{{c1::volume computed tomography dose index (CTDIvol )}} = {{c2::CTDIweighted / pitch::equatio…
Published	05/01/2023	Imaging Physics: Radiation DosimetryPitch is related to the table {{c1::speed}}.
Published	05/01/2023	Imaging Physics: Radiation DosimetryPitch {{c1::<1 (overscan):: <1 or >1}} will result in {{c2::increased::increased/decreased}} radiati…
Published	05/01/2023	Imaging Physics: Radiation DosimetryPitch {{c1::>1 (underscan):: <1 or >1}} will result in {{c2::decreased::increased/decreased}} radiat…
Published	05/01/2023	Imaging Physics: Radiation DosimetryCTDI{{c1::vol::vol or w}} is the same for all scans, independent of scan {{c2::length}}.
Published	05/01/2023	Imaging Physics: Radiation DosimetryCTDIvol should be {{c1::less::more/less}} than reference values: Adult head: {{c2::75}} mGy ({{c2::16}} cm phantom…
Published	05/01/2023	Imaging Physics: Radiation DosimetryWhat is the best way to estimate radiation risk from CT?{{c1::dose length product (DLP)}}
Published	05/01/2023	Imaging Physics: Radiation Dosimetry{{c1::Dose length product (DLP)}} = {{c2::CTDIvol * scan length::equation}}
Published	05/01/2023	Imaging Physics: Radiation DosimetryDose length product (DLP) is measured in {{c1::mGy*cm::units}}
Published	05/01/2023	Imaging Physics: Radiation DosimetryThe {{c1::effective dose (mSv)}} can be obtained from the {{c2::DLP}} by using body-part specific conver…
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Body-part specific conversion factors to convert DLP → effective dose:Head: {{c1::0.0023}} mSv/mGy cm
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Body-part specific conversion factors to convert DLP → effective dose:Neck: {{c1::0.0054}} mSv/mGy cm
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Body-part specific conversion factors to convert DLP → effective dose:Chest: {{c1::0.019}} mSv/mGy cm
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Body-part specific conversion factors to convert DLP → effective dose:Abdomen: {{c1::0.017}} mSv/mGy cm
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Body-part specific conversion factors to convert DLP → effective dose:Pelvis: {{c1::0.017}} mSv/mGy cm
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Body-part specific conversion factors to convert DLP → effective dose:Legs: {{c1::0.0008}} mSv/mGy cm
Published	05/01/2023	Imaging Physics: Radiation Dosimetry DLP = 900 mGycm Study/modality = abdominal CTRadiation exposure = {{c1::(900 mGycm) * (0.017 mSv/mGy cm)::…
Published	05/01/2023	Imaging Physics: Radiation Dosimetry DLP = 1000 mGycm Study/modality = chest CTRadiation exposure = {{c1::(1000 mGycm) * (0.019 mSv/mGy cm)::eq…
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Radiography Effective DosesPA and lateral chest radiograph: {{c1::0.1}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Radiography Effective DosesCervical spine radiograph: {{c1::0.2}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Radiography Effective DosesLumbar spine radiograph: {{c1::1.5}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Radiography Effective DosesAbdomen radiograph: {{c1::0.7}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Radiography Effective DosesPelvic radiograph: {{c1::0.6}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Radiography Effective DosesMammography: {{c1::0.4}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Radiography Effective DosesKnee radiograph: {{c1::0.005}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Fluoroscopy Effective DosesUpper GI series: {{c1::6}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Fluoroscopy Effective DosesBarium enema: {{c1::8}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Interventional Radiology Effective DosesCerebral angiography: {{c1::1–10}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Interventional Radiology Effective DosesPeripheral angiography: {{c1::5}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Interventional Radiology Effective DosesCardiac cath (diagnostic): {{c1::7}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry Interventional Radiology Effective DosesTIPS: {{c1::100}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry CT Effective DosesHead CT: {{c1::2}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry CT Effective DosesNeck CT: {{c1::3}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry CT Effective DosesChest CT: {{c1::7}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry CT Effective DosesAbdomen CT: {{c1::8}} mSv
Published	05/01/2023	Imaging Physics: Radiation Dosimetry CT Effective DosesPelvis: {{c1::6}} mSv
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