1. MRI and x-ray CT study of spatial distribution of core breakdown in ‘Conference’ pears 
J Lammertyn, T Dresselaers, P Van Hecke, P Jancsók, M Wevers, B.M Nicolaï 
Magnetic Resonance Imaging 
Volume 21, Issue 7, Pages (September 2003)
DOI: /S X(03)00105-X

2. Fig. 1
Six stages in the algorithm to determine the area percentage affected and unaffected tissue, core and cavities. The dark gray region in the center of the slice and the black ellipsoidal shape correspond to brown discoloured tissue and a cavity, respectively.
Magnetic Resonance Imaging  , DOI: ( /S X(03)00105-X)

3. Fig. 2
X-ray CT scan of an affected pear (A) and the corresponding histogram of the pixel intensities for tissue (B).
Magnetic Resonance Imaging  , DOI: ( /S X(03)00105-X)

4. Fig. 3
Eleven transversal MR images of one pear. Slice 1 corresponds to the lower rectangular overlay (number 1) on the longitudinal slice in Fig. 4. Black, dark gray and light gray areas correspond to cavities, brown tissue and unaffected tissue, respectively.
Magnetic Resonance Imaging  , DOI: ( /S X(03)00105-X)

5. Fig. 4
MR image of a longitudinal pear slice. Rectangular overlays indicate the positions of the transversal slices displayed in Fig. 3. The slice thickness and slice-to-slice distance (center to center) were 3 mm and 5.4 mm, respectively.
Magnetic Resonance Imaging  , DOI: ( /S X(03)00105-X)

6. Fig. 5
Signal intensities of an ‘affected’ and ‘unaffected’ pixel at different TR values. A single exponential recovery curve was fitted to this data to determine the T1 and NH values of that pixel.
Magnetic Resonance Imaging  , DOI: ( /S X(03)00105-X)

7. Fig. 6
Original MR image (A), T1 map (B) and proton density map (C) of a pear slice with affected tissue (low intensity at left side of all three MR images). The white contour on the T1 map delineates the area of affected tissue (lower T1 values than unaffected tissue).
Magnetic Resonance Imaging  , DOI: ( /S X(03)00105-X)

8. Fig. 7
Fifty X-ray CT scans of pear affected with core breakdown. Healthy tissue and background correspond, respectively, to the highest and lowest pixel intensities. Cavities are black. The bright ring shape is an artifact of the plastic holder.
Magnetic Resonance Imaging  , DOI: ( /S X(03)00105-X)

9. Fig. 8
Positions of the 50 transversal slices indicated by lines on a traditional two-dimensional projection X-ray image. The bright area in the center of the fruit indicates the presence of a cavity.
Magnetic Resonance Imaging  , DOI: ( /S X(03)00105-X)

10. Fig. 9
Comparison of area percentage brown tissue, unaffected tissue, cavity and core as function of slice number for X-ray CT images (O), MR images (Δ) and actual photographs (□).
Magnetic Resonance Imaging  , DOI: ( /S X(03)00105-X)

11. Fig. 10
Comparative overview of the corresponding X-ray CT scans, MR images and actual photographs. The blue component of the RGB-values was plotted for the digital photographs, to enhance the image contrast between affected and unaffected tissue. On the X-ray CT scans the bright and dark pixels correspond to affected and unaffected tissue respectively. The outer bright ring represents the skin.
Magnetic Resonance Imaging  , DOI: ( /S X(03)00105-X)