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Results: 7

1.
Figure 4

Figure 4. Nude mouse axillary node with hyperintense center.. From: Comparing the MRI Appearance of the Lymph Nodes and Spleen in Wild-Type and Immuno-Deficient Mouse Strains.

(A) MR image. (B) Corresponding histology. The hyperintense area within the lymph node (arrow) corresponds to a cavity that is visible in the histology.

Vasiliki Economopoulos, et al. PLoS One. 2011;6(11):e27508.
2.
Figure 1

Figure 1. Location of lymph nodes within the mouse body.. From: Comparing the MRI Appearance of the Lymph Nodes and Spleen in Wild-Type and Immuno-Deficient Mouse Strains.

(A) Whole mouse body bSSFP image of a C57Bl/6 mouse showing both the brachial and inguinal lymph nodes (arrows) and (B) 3D reconstruction showing the location of various lymph nodes within the mouse; 1 – axillary node, 2 – brachial node, 3 – inguinal node, 4 – popliteal node.

Vasiliki Economopoulos, et al. PLoS One. 2011;6(11):e27508.
3.
Figure 6

Figure 6. bSSFP images of the spleen.. From: Comparing the MRI Appearance of the Lymph Nodes and Spleen in Wild-Type and Immuno-Deficient Mouse Strains.

(A) C57Bl/6 mice. (B) Nude mice. (C) CB-17 SCID mice. (D) NOG mice. (E) Spleen volume in C57Bl/6, Nude, CB-17 SCID and NOG mice. (*) Spleen volumes were significantly smaller in CB-17 SCID and NOG mice (p<0.0001) compared to C57Bl/6 and nude mice. One way ANOVA test was used. Error bars represent the standard deviation.

Vasiliki Economopoulos, et al. PLoS One. 2011;6(11):e27508.
4.
Figure 5

Figure 5. MR images of a nude mouse brachial lymph node acquired with different pulse sequences.. From: Comparing the MRI Appearance of the Lymph Nodes and Spleen in Wild-Type and Immuno-Deficient Mouse Strains.

(A) bSSFP image of whole mouse body, (B) bSSFP image of lymph node, (C) T1w SE of lymph node (TR = 600 ms, TE = 25 ms), (D) T2w SE of lymph node (TR = 2000 ms, TE = 80 ms)

Vasiliki Economopoulos, et al. PLoS One. 2011;6(11):e27508.
5.
Figure 7

Figure 7. Lymph node volumes over time.. From: Comparing the MRI Appearance of the Lymph Nodes and Spleen in Wild-Type and Immuno-Deficient Mouse Strains.

(A) C57Bl/6 mice. (B) Nude mice. (C) CB-17 SCID mice. Significant differences were found in the inguinal (p = 0.0071) nodes of C57Bl/6 mice. Significant differences were also found in the axillary (p = 0.0104), inguinal (p = 0.0155) and popliteal (p = 0.0046) nodes of nude mice. Significant differences were also found in SCID mice in the brachial (p = 0.0130) and inguinal nodes (p = 0.0225). (*) Significantly different compared to day 7. Repeated measures ANOVA test was used. Error bars represent the standard deviation.

Vasiliki Economopoulos, et al. PLoS One. 2011;6(11):e27508.
6.
Figure 3

Figure 3. H&E sections of brachial lymph nodes from C57B/l6, Nude and C.B.-17 SCID mice.. From: Comparing the MRI Appearance of the Lymph Nodes and Spleen in Wild-Type and Immuno-Deficient Mouse Strains.

Whole nodes are shown at 5x magnification. The T cell rich paracortex (arrowsheads) and B cell rich follicles (arrows) can be easily seen in the nodes of C57B/l6 mice, where as in Nude mouse lymph nodes, only the B cell rich follicles can be seen (arrows). In the areas of the paracortex where T cells should be found, vacant areas are detected (arrowheads), helping to explain the hyperintense appearance of many of these nodes in MR images. Nodes in SCID mice lack both the paracortex and follicles, leaving these nodes underdeveloped and significantly smaller in size.

Vasiliki Economopoulos, et al. PLoS One. 2011;6(11):e27508.
7.
Figure 2

Figure 2. MR appearance and volumes of lymph nodes various mouse strains.. From: Comparing the MRI Appearance of the Lymph Nodes and Spleen in Wild-Type and Immuno-Deficient Mouse Strains.

(A) MR appearance of the axillary, brachial, inguinal and popliteal lymph nodes in C57Bl/6, Nude, CB-17 SCID and NOG mice. The brachial, inguinal and popliteal lymph nodes are easiest to visualize due to their location within a fat pad. Lymphatic vessels are also visible in acquired images (arrowhead). Images for the NOG mice are included for completeness although there were no MRI detectable lymph nodes. (B) Volumes of the axillary, brachial, inguinal and popliteal lymph nodes in C57Bl/6, Nude and CB-17 SCID mice. The brachial, inguinal and popliteal lymph nodes in CB-17 SCID mice were found to be significantly smaller than those in both C57Bl/6 and Nude mice (*, p<0.0001 for brachial and inguinal and p = 0.0128 for popliteal). The axillary node in Nude mice was significantly larger than those in both CB-17 SCID and C57Bl/6 mice (**, p<0.0001). One way ANOVA test was used. Error bars represent the standard deviation.

Vasiliki Economopoulos, et al. PLoS One. 2011;6(11):e27508.

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