Percentage depth dose curve

In radiotherapy, a percentage depth dose curve (PDD) (sometimes percent depth dose curve) relates the absorbed dose deposited by a radiation beam into a medium as it varies with depth along the axis of the beam. The dose values are divided by the maximum dose, referred to as dmax, yielding a plot in terms of percentage of the maximum dose. Dose measurements are generally made in water or "water equivalent" plastic with an ionization chamber, since water is very similar to human tissue with regard to radiation scattering and absorption.

Percent depth dose (PDD), which reflects the overall percentage of dose deposited as compared to the depth of maximum dose, depends on the depth of interest, beam energy, field size, and SSD (source to surface distance) as follows. Of note, PDD generally refers to depths greater than the depth of maximum dose

  • PDD decreases with increasing depth due to the inverse square law and due to attenuation of the radiation beam
  • PDD increases with increasing radiation field size due to greater primary and scattered photons from the irradiated medium
  • PDD increases with increasing SSD because inverse square variations over a fixed distance interval are smaller at large total distance than small total distance [1]


See also

References

  1. ^ McDermott, Patrick; Orton, Colin G. (2018). The physics & technology of radiation therapy (Second ed.). p. 10-7. ISBN 978-1930524989.
  • [1] Radiation Therapy Physics, Hendee W., Ibbott G. and Hendee E. (2005) Wiley-Liss Publ., ISBN 0-471-39493-9

Read other articles:

Live and Let Die (film)

Live and Let DiePoster film resmi karya Robert McGinnisSutradaraGuy HamiltonProduserHarry SaltzmanAlbert R. BroccoliDitulis olehTom MankiewiczBerdasarkanLive and Let Dieoleh Ian FlemingPemeran Roger Moore Yaphet Kotto Jane Seymour Penata musikGeorge MartinSinematograferTed MoorePenyunting Bert Bates Raymond Poulton John Shirley PerusahaanproduksiEon ProductionsDistributorUnited ArtistsTanggal rilis 27 Juni 1973 (1973-06-27) (Amerika Serikat) 12 Juli 1973 (1973-07-12) (...

 

 

محكمة العمل الاتحادية (ألمانيا)

محكمة العمل الاتحادية (ألمانيا)الشعارالتاريخالتأسيس أبريل 1954 المدير Inken Gallner (en) (2022 – ) الإطارالاختصار BAG (بالألمانية)[1] النوع محكمة علياFederal courts (Germany) (en) labor court (en) منطقة الاختصاص ألمانيا المقر الرئيسي إرفورت على الخريطة — Dienstgebäude für das Wehrkreiskommando IX (de) البلد  ألمانيا[2...

 

 

Palmerah, Jakarta Barat

Koordinat: 6°11′06″S 106°48′00″E / 6.185°S 106.80°E / -6.185; 106.80 PalmerahKecamatanPeta lokasi Kecamatan PalmerahPalmerahPeta lokasi Kecamatan PalmerahTampilkan peta JakartaPalmerahPalmerah (Jawa)Tampilkan peta JawaPalmerahPalmerah (Indonesia)Tampilkan peta IndonesiaKoordinat: 6°11′06″S 106°48′00″E / 6.185°S 106.80°E / -6.185; 106.80Negara IndonesiaProvinsiDKI JakartaKota AdministrasiJakarta BaratPemerintahan ...

Chunhuhub

Town in Quintana Roo, MexicoChunhuhubTownA historic church in ChunhuhubChunhuhubLocation of the Municipality in MexicoCoordinates: 19°35′07″N 88°35′32″W / 19.58528°N 88.59222°W / 19.58528; -88.59222Country MexicoState Quintana RooMunicipalityFelipe Carrillo PuertoElevation14 m (46 ft)Population (2010)[1] • Total4,644Time zoneUTC-5 (EST)Municipalities of Quintana Roo Chunhuhub is a town in the Mexican state of Quintana...

 

 

Torneo Rio-San Paolo 1998

Torneo Rio-San Paolo 1998Torneio Rio-São Paulo 1998 Competizione Torneo Rio-San Paolo Sport Calcio Edizione 21ª Date dal 21 gennaio 1998al 3 marzo 1998 Luogo  Brasile Partecipanti 8 Risultati Vincitore  Botafogo(4º titolo) Secondo  San Paolo Statistiche Miglior marcatore Dodô (San Paolo), 5 gol Incontri disputati 30 Gol segnati 83 (2,77 per incontro) Cronologia della competizione 1997 1999 Manuale Il Torneo Rio-San Paolo 1998 (ufficialmente in portoghese ...

 

 

Charles Joseph Bonaparte

American lawyer (1851–1921) Charles Bonaparte46th United States Attorney GeneralIn officeDecember 17, 1906 – March 4, 1909PresidentTheodore RooseveltPreceded byWilliam MoodySucceeded byGeorge W. Wickersham37th United States Secretary of the NavyIn officeJuly 1, 1905 – December 16, 1906PresidentTheodore RooseveltPreceded byPaul MortonSucceeded byVictor H. Metcalf Personal detailsBornCharles Joseph Bonaparte(1851-06-09)June 9, 1851Baltimore, Maryland, U.S.DiedJune 28, 19...

Frederick III, Holy Roman Emperor

Holy Roman Emperor from 1452 to 1493 Frederick IIIPortrait by Hans Burgkmair, c. 1500Holy Roman EmperorKing of ItalyReign19 March 1452 – 19 August 1493Coronation19 March 1452PredecessorSigismundSuccessorMaximilian IKing of GermanyReign2 February 1440 – 19 August 1493Coronation17 June 1442PredecessorAlbert IISuccessorMaximilian IAlongsideMaximilian I (1486–1493)Archduke of AustriaReign23 November 1457 – 19 August 1493PredecessorLadislausSuccessorMaximilian IAlongsideAlbert VI (14...

 

 

Ludwig Hahn

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Ludwig Hahn – news · newspapers · books · scholar · JSTOR (August 2023) (Learn how and when to remove this message) Ludwig HahnBorn(1908-01-23)23 January 1908Eitzen, Province of Hanover, German EmpireDied10 November 1986(1986-11-10) (aged 78)Ammersbek, Wes...

 

 

Aeroporto di Lukla

Aeroporto di Luklaaeroporto Codice IATALUA Codice ICAOVNLK Nome commercialeTenzing-HillaryLukla Airportतेन्जिङ हिलारी विमानस्थल DescrizioneTipoCivile Stato Nepal CittàLukla Altitudine2 846 m s.l.m. Coordinate27°41′16″N 86°43′53″E / 27.687778°N 86.731389°E27.687778; 86.731389Coordinate: 27°41′16″N 86°43′53″E / 27.687778°N 86.731389°E27.687778; 86.731389 Mappa di localizzazio...

Silverstream railway station

Railway station in New Zealand SilverstreamMetlink suburban railSilverstream station in 2021General informationLocationFergusson Drive and Kiln Street, Silverstream, Upper Hutt, New ZealandCoordinates41°08′50.42″S 175°00′38.63″E / 41.1473389°S 175.0107306°E / -41.1473389; 175.0107306Owned byGreater Wellington Regional CouncilLine(s)Wairarapa LineTracksMain line (2)ConstructionStructure typeIslandParkingYesBicycle facilitiesYesOther informationStation codeSI...

 

 

Gereja Katolik di Lesotho

Bagian dari seriGereja Katolik menurut negara Afrika Afrika Selatan Afrika Tengah Aljazair Angola Benin Botswana Burkina Faso Burundi Chad Eritrea Eswatini Etiopia Gabon Gambia Ghana Guinea Guinea-Bissau Guinea Khatulistiwa Jibuti Kamerun Kenya Komoro Lesotho Liberia Libya Madagaskar Malawi Mali Maroko Mauritania Mauritius Mesir Mozambik Namibia Niger Nigeria Pantai Gading Republik Demokratik Kongo Republik Kongo Rwanda Sao Tome dan Principe Senegal Seychelles Sierra Leone Somalia Somaliland ...

 

 

Haverhill Rovers F.C.

Association football club in England Football clubHaverhill RoversFull nameHaverhill Rovers Football ClubNickname(s)RoversFounded1886GroundThe New Croft, HaverhillCapacity3,000 (200 seated)[1]ManagerBen CowlingLeagueEastern Counties League Division One North2023–24Eastern Counties League Division One North, 10th of 21WebsiteClub website Home colours Away colours Haverhill Rovers Football Club are a football club based in Haverhill, Suffolk, England. They are currently members of the...

Atanas Mihaylov

Bulgarian footballer (1949–2006) In this Bulgarian name, the patronymic is Hristov and the family name is Mihaylov. Atanas Mihaylov Personal informationFull name Atanas Hristov MihaylovDate of birth (1949-07-05) 5 July 1949 (age 74)Place of birth Sofia, BulgariaDate of death 1 October 2006(2006-10-01) (aged 57)Height 1.85 m (6 ft 1 in)Position(s) ForwardSenior career*Years Team Apps (Gls)1964–1968 Lokomotiv Sofia 77 (26)1969–1971 ZHSK Slavia 43 (14)1971–19...

 

 

Muzaffar Shah I

For other people of the same name, see Muzaffar Shah. 14th-century Islamic governor of Gujarat Muzaffar Shah IGovernor of Gujarat, Delhi SultanateSultan of GujaratReign1391–1403PredecessorFarhat-ul-Mulk Rasti KhanSuccessorMuhammad Shah IReign1404–10 January 1411PredecessorMuhammad Shah ISuccessorAhmad Shah IDied10 January 1411Burial1411Anhilwada PatanDynastyMuzaffarid dynasty of GujaratFatherWajih-ul-MulkReligionIslam Copper coin of Muzaffar Shah Gujarat SultanateMuzaffarid dynasty Muzaff...

 

 

Bachata (dance)

Social dance from the Dominican Republic This article is about dance type. For music genre, see Bachata (music). This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Bachata dance – news · newspapers · books · scholar · JSTOR (April 2015) (Learn how and when to remove this message) A couple dancing bachata ...

Oliver House, Toledo, Ohio

Oliver House The Oliver House is a historic hotel building in Toledo, Ohio, designed by the architect Isaiah Rogers and opened in 1859.[1] It was converted to industrial use in the 20th century and is now home to the Maumee Bay Brewing Company and its brew pub, as well as a patisserie, restaurants, event spaces, a theater company, art gallery, and residential apartments.[2][3] It is listed on the National Register of Historic Places.[4] as Successful Sales. The...

 

 

侯德榜

侯德榜性别男出生1890年8月9日 大清帝國福州府侯官县坡尾（今台江区义洲）逝世1974年8月26日(1974歲—08—26)（84歲） 中华人民共和国北京国籍 中华人民共和国教育程度 福州英华书院 清宣统二年（1910年），毕业于上海铁路学堂 北京留美预备学堂 麻省理工学院 柏拉图专科学院和哥伦比亚大学研究院，先后取得学士、硕士和博士学位。 职业化工专家政党 中国共...

 

 

History of the Jews in Jersey

Not to be confused with History of the Jews in New Jersey. The location of Jersey (in red) near the United Kingdom in Europe The location of the two Bailiwicks of Guernsey and Jersey (in red circle) form the Channel Islands in Europe Part of a series onJews and Judaism Etymology Who is a Jew? Religion God in Judaism (names) Principles of faith Mitzvot (613) Halakha Shabbat Holidays Prayer Tzedakah Land of Israel Brit Bar and bat mitzvah Marriage Bereavement Baal teshuva P...

Heimdallargaldr

Heimdallr et ses neuf mères (1908) par W. G. Collingwood, où les neuf mère d'Heimdallr sont peintes comme des vagues Heimdallargaldr, aussi écrit Heimdalargaldr (vieux norrois « galdr d'Heimdallr »), est un poème en vieux norrois sur le dieu Heimdallr de la mythologie nordique. Le poème est mentionné dans deux livres de l'Edda de Snorri datant du XIIIe siècle (Gylfaginning et Skáldskaparmál) mais à part un fragment unique, deux lignes qui apparaissent dans le Gylfa...

 

 

Pertempuran Kolín

Pertempuran Kolín, 1757 Pertempuran Kolín pada 18 Juni 1757 menimbulkan 44,000 pasukan Austria di bawah kepemimpinan Count von Daun mengalahkan 32,000 pasukan Prusia di bawah kepemimpinan Frederick Agung pada Perang Schlesien Ketiga (Perang Tujuh Tahun). Pasukan Prusia kalah dalam pertempuran tersebut dan kehilangan sekitar 14,000 pasukan, dan pasukan Austria kehilangan 8,000 pasukan. Referensi Asprey, Robert. Frederick the Great: A Magnificent Enigma, Ticknor & Fields, 2007 ISBN 0-8991...