53
REFERENCES
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126-137, (1961).
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5. Marshall, J. H. Measurements and Models of Skeletal
Metabolism. Mineral Metabolism, Ed. C. Comar and F.
Bronner, in press.
6. Lloyd, E. Quantitative Autoradiography of Ca‘5 in Bone.
Calcified Tissues (University of Liege) 31, 381-390 (1965).
~y
a
1. Evans, R. D. Radium and Mesothorium Poisoning and
Dosimetry and Instrumentation Techniques in Applied
Radioactivity. MIT Annual Progress Report MIT-952-2
(May 1965).
2. Fletcher, W., Loutit, J. F., and Papworth, D. G. Interpretation of Levels of Strontium-90 in Human Bone. Brit,
Med. Journal 2, 1225-1230 (November 1966).
3. Sears, K. A., Jee, W.S.S., and Mays, C. W. Radium Dosimitry, University of Utah, College of Medicine, Department
of Anatomy, Radiobiology Division, Semiannual Report,
COO-226 (1962).
4. Rowland, R. E. Microseopic Metabolism of Ra?** in Canine
Bone and its Bearing on the Radiation Dosimetry of
Internally Deposited Alkaline Earths. Radiat. Res. 16 (1),
|
100
YEARS Ra@?5 caRRIED
Fig. 47-——Summaryof data on “Ra in human bone
. Rowland, R. E. Unpublished data (1969).
8. Rowland, R. E. and Marshall, J. H. Radium in Human
Bone: The Dose in Microscopic Volumes of Bone. Radiat.
Res. 11, 299-313 (1959).
9, Ellsasser, J. C., Farnham, J. E., and Marshall, J. H. Comparative Kinetics and Autoradiography of Ca‘® and Bals3
in Ten-Year-Old Beagle Dogs; The Diffuse Component
Distribution throughout the Skeleton. To be published
VARIATIONS IN THE SURFACE AREA AND VOLUME OF BONE IN CROSS SECTIONS
| TAKEN FROM A SINGLE HUMANRIB
Elizabeth Lloyd
The human rib is a convenient site for bone biopsy and is
often used to obtain estimates of skeletal mineralization or
, Tadioisotope uptake. It is not generally appreciated how much
the character of a rib varies along its length. An automatic
filin scanning system (CHLOE) is used to demonstrate the
changes in surface-to-volume ratio which onefinds in a single
human rib.
Our interest in the surface area and volumeof cross
sections of bone was aroused by the fact that some
\otspot
of loss |
ress in ,
in the |
atio to ;
other,
: level would
Fic. 48.—Microradiographs of cross sections of the sixth rib