noes *rt. 40. Whe cris/ of bt:foo : 7 at le cal cone. etytlo n Td. of dose snc at eh hi, \ ree ute : corccraed |bers with th radiosMLIVe Dwell ab earache (ieee nly ks of Psbeteaveehb iatees usiccia t ( eo: oman . prticulste mintesvialin the thoae, esp cially wha pat.Wah some sol xray ganitonpdipoddt He ed ecemilters, Lece the bocal dase ‘eat reach: doyandiayunphaide,andgayaa vets based JRigh: nflies even thous theangan tite dose 8Rel ose Csterminaiion encounters prmouad aay!de very low, Certs,fay ‘ . sper os sf af , Camizcst Derssueeed |liReuttics, Ce Corinfering aly ne!Oe ee:wee mat Hicachty (fost and Sect will"ytrotd ot -net nie is hest the pioblsi Re a of lect rad of kizowM wElOPA 6 eds e of ian Cloves and Coss raten On ihe Olner hand, the sensi Nity to radhation. induces. Jetdignant there nay bea2 great deal of cult death:Bed pare“thang eof thereticulum cztis pretant, pata Post tleuledy with c-ers ysAES Cy tes themeses. Also gay: ; laston, with is bare ayesworl ily ako afoe Sa defined Tange, ra : te muraber of: Matvieble . Ctleulauioan of or lclaye distribution to the various 1 a ye Ty 1 ° e Toon: “i be sail ostpared with the number of | Clements of the Iymphoid disse would resparte i keel cells. iloweven,‘this rade a 1 wil deosast aa lintermation, at present unavails faute, on sich + He sineued activity of theo particles, the extent i sulsjocts Pg Gre dayne of2rureuation offthep:arti. wat NY hich tw toy 2P - earegate, an a] hei ny aveaient | Within the tissu y Cuuagts we mal witltiq bias Lino noghes, its ells! change with tise aad the rovement of Gee . ° Ast them. . . particles within. the lymph | nodes. In addition ! 41, Onthe basis of sencral considera 2 tong und - : Chere is very Hiile reported work on the gistri. = of some experinsatal data and Clinical exp eri ‘en “butionof the m:terial within the nodes, which ! at ° : yes ee ce the: Le:vk Group were of the opin a tty coul) he obtained by 2autor: liograntic astedy, a Sor Iaie chects, the fame rndindLah Ostrey ab- 2 von the dearee of fibrasigand enter listelogical sorption nrght well. beless chective vai cist shatiges}worduced. Betterdaia seeelieteguired : buted as 2 series of “hot Spots” thaywhenstial atheresidence timesofthe partiqulnie mraluriz : ' formly distributed. Thuz, wsith particulate radia® ist“in.the Iymptr nodes aud the vohibiiity of the| * active sources Wwithia a tissue2 a mean tissreetose “particutste avaterial. over snauyt years. Auoth er ' would .probably introduce xfactor of .safe wend st factor to be teeninto consideration, cominto i peWEVEr, @% Savers pr.actical probk,ery dies now : at} paviiculate deposiitor and especialsy to those cen recognizediinSoanection with the ishalge.¢dinVelvine evenitterss that thetininle: ofcelfs ' . irradinte|}s Pave t" tion ofp! uw ontum pewrdculs“ites) madisonany 4t ssinie 1 DAI Paha tiysere Cony very in.te Unites States ancl iomplimitetis ‘Rees hunitinSatfects it has become clear that osecolegtinticnécanbe: 0 Re tewe oe Comsidlerec du ein wy & “bask Croup ori Corn * dependent enthe particlesize, Kiaally, bya:apho- : mittee } of IORY. =. OPSeye migeation is a ® factor that shouta be taken 2. Fron dog experiments beins carr juto coisidgretiion, ‘ tee "and© he“Task, Group:considered, that they Ce fionof£plutontors: particulates-canJen evalu Torconiotiieaywithin, therecominenda” concentrationsof the particulateinateris? : tons, refer to the whole Iymph tissue and not pulmonary Jymph nodes, and thet, themean.“only to the respiratozy ymeh nodes. However, | radiation dose to the pulmonary lymph: rodiag? untif more information becomes 8 vaitable on’ end indeed to lymphoid tissuz a artholefe vgsorme of the subjects mentionedt above; tte likely to be greatly in excess ofthat tothisht, ave}icht cadSDs prt on dose cals uteations.Data o ; 5 > tumour prowuctioa from aanimal experiments Gece a 3 the erica! orzan resarded estat forabated orinhaled paiiiculats matter. _ . of more signife: of zUuCe, nad therenutts of preseat 3. Theactual dose ratios arg not yee, with Anyprecision butthe ‘Lask.Grou Dt, _ Stoodtaatithe meal’ lose tolympho tis “Awhatstaight exeevel, that,to: the any oO Pa *, Ss n wwhele-e 08 Previainant , os " particular ®should!" tation. atSe: re tivity and ibution F Dose (ateis enwhether“the” dosetant &ont bs -Biterirs ticuTsta' for 7 reat vedus, Hy teduced Lstow the ens- , » | (Publication 14 appears as a renort.of two Task Erowos, and not as the official reconme mations of tha ICRP.)