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296:. A computed tomography algorithm effectively reconstructs the complete internal three-dimensional geometry of an object, given a complete set of all plane sections through it (or equivalent X-ray data). On the contrary, stereological techniques require only a few 'representative' plane sections, from which they statistically extrapolate the three-dimensional material.
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In addition to two-dimensional plane sections, stereology also applies to three-dimensional slabs (e.g. 3D microscope images), one-dimensional probes (e.g. needle biopsy), projected images, and other kinds of 'sampling'. It is especially useful when the sample has a lower spatial dimension than the
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Stereology exploits the fact that some 3-D quantities can be determined without 3-D reconstruction: for example, the 3-D volume of any object can be determined from the 2-D areas of its plane sections, without reconstructing the object. (This means that stereology only works for certain quantities
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researchers compare plane sections of normal and diseased tissue from an organ. They find that a certain type of cell is seen more frequently in the diseased tissue. They conclude that the disease involves proliferation of these cells. However, the number of cell profiles seen on a section depends
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Design-based stereological methods can be applied to materials which are inhomogeneous or cannot be assumed to be homogeneous. These methods have gained increasing popularity in the biomedical sciences, especially in lung-, kidney-, bone-, cancer- and neuro-science. Many of these applications are
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we can effectively sample a fixed fraction of the entire material (without the need to delineate a reference volume). This allows us to extrapolate from the sample to the entire material, to obtain estimates of total quantities such as the absolute surface area of lung and the absolute number of
361:
Many classical stereological techniques, in addition to assuming homogeneity, also involved mathematical modeling of the geometry of the structures under investigation. These methods are still popular in materials science, metallurgy and petrology where shapes of e.g. crystals may be modelled as
270:
a biological tissue containing capillaries is sectioned. Researchers count the number of profiles of capillaries that are visible in a microscope field, and report the "number of capillaries" or "number of capillaries per unit area". This is an error because the number of capillary profiles on a
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of materials or tissues. It provides practical techniques for extracting quantitative information about a three-dimensional material from measurements made on two-dimensional planar sections of the material. Stereology is a method that utilizes random, systematic sampling to provide unbiased and
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The second approach is the one typically used in modern stereology. Instead of relying on model assumptions about the three-dimensional material, we take our sample of plane sections by following a randomized sampling design, for example, choosing a random position at which to start cutting the
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plane sections of quenched steel contain thin linear streaks of
Martensite. For many years this was interpreted as demonstrating that the Martensite inclusions are "needle-like". But if every plane section shows linear profiles, then the Martensite inclusions must be plate-like, rather than
282:
the construction of historic Tabby buildings in the
Carolinas was assumed to be done with sand obtained from sand pits. Stereological studies demonstrated that the sand was obtained from dunes facing the bays. This has caused the method of construction to be rethought as well as methods of
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The first approach is the one that was used in classical stereology. Extrapolation from the sample to the 3-D material depends on the assumption that the material is homogeneous. This effectively postulates a statistical model of the material. This method of sampling is referred to as
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The popular science fact that the human lungs have a surface area (of gas exchange surface) equivalent to a tennis court (75 square meters), was obtained by stereological methods. Similarly for statements about the total length of nerve fibres, capillaries etc. in the human body.
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quantities such as the total surface area of the lung's gas exchange surface, or the total length of capillaries in the brain. relative densities are also problematic because, unless the material is homogeneous, they depend on the unambiguous definition of the reference volume.
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1923 statistician S.D. Wicksell formulates the general problem of particle size – inferring the distribution of sizes of 3-D particles from the observed distribution of sizes of their 2-D profiles – and solves it for spherical
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West, M.J., L. Slomianka, and H.J.G. Gundersen : Unbiased stereological estimation of the total number of neurons in the subdivisions of the rat hippocampus using the
Optical Fractionator. Anatomical Record 231: 482–497,
255:
The word
Stereology was coined in 1961 and defined as `the spatial interpretation of sections'. This reflects the founders' idea that stereology also offers insights and rules for the qualitative interpretation of sections.
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both on the number of cells and on their sizes. So it is possible that the disease process simply involves an increase in the size of cells, without any proliferation. (Number in 2D is related to length or height in 3D).
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calculating the total length of capillaries per unit volume of a biological tissue, by counting the number of profiles of capillaries per unit area on a typical histological section of the tissue (multiplied by
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simple geometrical objects. Such geometrical models make it possible to extract additional information (including numbers of crystals). However, they are extremely sensitive to departures from the assumptions.
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To extrapolate from a few plane sections to the three-dimensional material, essentially the sections must be 'typical' or 'representative' of the entire material. There are basically two ways to ensure this:
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In the classical examples listed above, the target quantities were relative densities: volume fraction, surface area per unit volume, and length per unit volume. Often we are more interested in
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calculating the surface area of pores per unit volume in a ceramic, by measuring the length of profiles of pore boundary per unit area on a typical plane section of the ceramic (multiplied by
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Stereologists have helped to detect many fundamental scientific errors arising from the misinterpretation of plane sections. Such errors are surprisingly common. For example:
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calculating the volume fraction of quartz in a rock by measuring the area fraction of quartz on a typical polished plane section of rock ("Delesse principle" from
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1985 stereologist H. Haug criticises the dogma that the normal human brain progressively loses neurons with age. He shows that the existing evidence is invalid.
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Mouton, Peter R. (2002). Principles and
Practices of Unbiased Stereology: An Introduction For Bioscientists. Baltimore: Johns Hopkins University Press.
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1975–80 statisticians R.E. Miles and P.J. Davy show that stereology can be formulated as a survey sampling technique, and develop design-based methods.
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Evans, S.M., Janson, A.M., Nyengaard, J.R. (2004).Quantitative
Methods in Neuroscience: A Neuroanatomical Approach. Oxford University Press, USA.
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1961 materials scientists Rhines and De Hoff develop a method for estimating the number of objects e.g. grains, particles, cells of convex shape.
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principles to extrapolate three-dimensional shapes from plane section(s) of a material. The statistical principles are the same as those of
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material. Extrapolation from the sample to the 3-D material is valid because of the randomness of the sampling design, so this is called
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Sampling principles also make it possible to estimate total quantities such as the total surface area of lung. Using techniques such as
150:). Stereology is a developing science with many important innovations being developed mainly in Europe. New innovations such as the
672:(1998) Local Stereology. Advanced Series on Statistical Science & Applied Probability Vol. 5. World Scientific Publishing.
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directed toward determining the number of elements in a particular structure, e.g. the total number of neurons in the brain.
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1946 anatomist
Abercrombie shows that many current methods for counting cells are erroneous, and proposes a correct method.
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1919 committee of ASTM (American
Society for Testing and Materials) established to standardise measurement of grain size.
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1946–58 materials scientist S.A. Saltykov publishes methods for determining surface area and length from plane sections.
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2004 Gokhale, Evans, Mackes and Mouton introduce virtual probe "virtual cycloids" for estimation of total surface area.
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invents the first technique (Delesse's principle) for determining volume fraction in 3D from area fraction on sections.
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of capillaries, not to their number (which may not even be well-defined). (Number in 2D is related to length in 3D).
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West, Mark J. (2012). Basic
Stereology – For Biologists and Neuroscientists. Cold Spring Harbor Laboratory Press.
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1999 Larsen and
Gundersen introduce global spatial sampling for estimation of total length in preferential slices.
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the internal structure of mammalian liver was misunderstood for 100 years (1848–1948) because of a similar error.
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Schmitz, C., and P. R. Hof. "Design-based stereology in neuroscience." Neuroscience 130, no. 4 (2005): 813–831.
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Find the parameters such as Bone Volume, Trabecular thickness and trabecular number in a given sample of bone.
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P.R. Mouton (2011). Unbiased Stereology: A Concise Guide. The Johns Hopkins University Press, Baltimore, MD.
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1988–92 Gundersen and Jensen propose the 'nucleator' and 'rotator' techniques for estimating particle volume.
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1948 biologist H. Elias uncovers a one-hundred-year-old misunderstanding of the structure of mammalian liver.
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1898 geologist A. Rosiwal explains how to determine volume fraction from length fraction on linear transects.
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discovers connections between geometry and probability, that ultimately lay the foundations for stereology.
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It is assumed that any plane section is typical (e.g. assume that the material is completely homogeneous);
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2002 Mouton, Gokhale, Ward and West introduce virtual probe "space balls" for estimation of total length.
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describes a method for measuring the surface area of a convex object from the area of projected images.
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1940s cancer researcher H. Chalkley publishes methods for determining surface area from plane sections.
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1929 mathematician H. Steinhaus develops stereological principles for measuring length of curves in 2D.
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1998 Kubinova introduces the first virtual probe that estimates surface area in preferential slices.
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1916 S. J. Shand builds the first integrating linear accumulator to automate stereological work.
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methods for inferring the mean volume of arbitrarily-shaped particles from plane sections.
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original material. Hence, stereology is often defined as the science of estimating higher-
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Plane sections are selected at random, according to a specified random sampling protocol
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continue to make important improvements in the efficiency of stereological procedures.
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1966 Weibel and Elias calculate the efficiency of stereological sampling techniques.
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1961 word 'stereology' coined. Foundation of the International Society of Stereology
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1930 geologist A.A. Glagolev builds a device for point counting with a microscope.
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1895 first known description of a correct method for counting cells in microscopy.
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quantitative data. It is an important and efficient tool in many applications of
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1952 Tomkeieff and Campbell calculate the internal surface area of a human lung.
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publishes theory of `geometrical probability' including stereological methods.
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1972 E. Underwood describes stereological techniques for projected images.
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Mouton, P.R. "Neurostereology" (2014) Wiley-Blackwell Press, Boston, MA.
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649:(2005), Stereology For Statisticians, Chapman & Hall/CRC.
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1986 Gundersen proposes the 'fractionator' sampling technique.
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In addition to using geometrical facts, stereology applies
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needle-like. (Length on sections is related to area in 3D).
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is the three-dimensional interpretation of two-dimensional
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1984 D.C Sterio describes the 'disector' counting method.
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Stereology is a completely different enterprise from
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592:The primary scientific journals for stereology are
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165:Stereology is based on fundamental principles of
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584:2008 Gundersen, Gardi, Nyengaard introduce the
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196:Classical applications of stereology include:
300:like volume, and not for other quantities).
162:information from lower-dimensional samples.
549:introduces the method of vertical sections.
183:It is a completely different approach from
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670:Vedel Jensen Eva B.
464:1944 mathematician
414:1885 mathematician
380:systematic sampling
304:Sampling principles
294:computed tomography
185:computed tomography
647:E. B. Vedel Jensen
645:Baddeley, A., and
545:1985 statistician
357:Geometrical models
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160:dimensional
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