Sample output 5

The table below represents a ranked list of terms extracted automatically from a corpus of knee MRI reports. Term variants grouped together in the second column represent lowercased versions of all surface forms found in the corpus. For each term, the variants are ordered by their frequency of occurrence in the corpus. The score in the rightmost column is called termhood and is calculated as a function of frequency and length (in tokens minus stopwords).

Note that acronyms are not defined explicitly in imaging reports. Still, FlexiTerm matches acronyms to their full forms without using any dictionaries. This paper provides more details on the approach used to extract implicit acronym definitions.

Alternatively, you may view the results as a dendrogram produced by the clustering algorithm described in this paper.

Rank Term variants Score
1 cruciate ligaments
 115.2165
2 acl
anterior cruciate ligament
 104.9175
3 collateral ligaments
 92.9279
4 mri knee
 71.9366
5 pcl
posterior cruciate ligament
 62.4012
6 medial meniscus
medial mensicus
 61.6901
7 lateral meniscus
 57.6698
8 mcl
medial collateral ligament
 54.3813
9 hyaline cartilage
 49.6467
10 posterior horn
 36.7368
11 medial collateral
 32.1158
12 joint effusion
 27.7259
13 mri rt knee
mri knee rt
 26.3667
14 complete acl
 25.4154
15 mri lt knee
mri knee lt
 24.7188
16 femoral condyle
femoral condyles
 24.0869
17 postero-lateral corner
posterolateral corner
 22.7352
18 lateral femoral condyle
 21.9722
19 medial femoral condyle
 20.8736
20 infrapatellar fat pad
infra-patella fat pad
infra-patellar fat pad
 18.6764
21 mri right knee
 17.5778
22 articular cartilage
 16.9821
22 patellar tendon
 16.9821
23 r mri knee
 16.4792
24 bone marrow
 14.4868
25 bone marrow oedema
 13.1833
26 complete proximal acl
 12.8755
27 weight bearing surfaces
weight bearing surface
weight-bearing surface
 12.4766
28 tibial plateaus
 12.1301
29 fat pad
 11.7835
30 popliteus tendon
 11.0904
31 normal extensor tendons
normal extensor tendon
 10.9861
31 mri left knee
 10.9861
31 normal patellar tendon
 10.9861
32 marrow oedema
 10.8923
33 lateral collateral ligament
lateral collateral ligaments
lcl
 9.8875
33 lateral ligamentous complex
lateral ligament complex
lateral ligamentus complex
 9.8875
33 normal extensor mechanism
 9.8875
33 lateral tibial plateau
 9.8875
34 lateral femoral condylar notch
 9.7041
34 patellofemoral joint
patellofemoral joints
 9.7041
35 lateral ligaments
 9.4730
36 extensor mechanism
 9.0109
36 inferior surface
 9.0109
37 cartilage defect
 8.4564
38 lateral weight bearing compartment
 8.3178
39 medial compartment
 7.6246
39 extensor tendons
 7.6246
40 articular surfaces
articular surface
 7.4513
41 right knee
 7.2780
42 acl injury
 6.9315
43 normal collateral ligaments
 6.5917
43 medial patella retinaculum
medial patellar retinaculum
 6.5917
43 medial tibial plateau
 6.5917
43 postero-lateral tibial plateau
posterolateral tibial plateau
 6.5917
44 acl rupture
 6.4694
45 lateral compartment
lateral compartments
 6.2383
45 left knee
 6.2383
45 subchondral oedema
sub-chondral oedema
 6.2383
46 normal menisci
 5.7762
47 subchondral bone
 5.6838
48 medial weight bearing compartment
 5.5452
48 mcl injury
medial collateral ligament injury
 5.5452
48 proximal mcl
 5.5452
48 effusion present
 5.5452
48 intercondylar notch
inter-condylar notch
 5.5452
49 subchondral bone change
 5.4931
49 hyaline cartilage defects
hyaline cartilage defect
 5.4931
49 fibular collateral ligament
 5.4931
49 medial patella facet
medial patellar facet
medial patellar facets
 5.4931
50 femoral attachment
 4.8520
50 normal cruciate
 4.8520
50 patellar facets
 4.8520
50 plain films
 4.8520
50 mid portion
 4.8520
51 osteochondral compression fracture
 4.3944
51 normal postero-lateral corner
 4.3944
51 discoid lateral meniscus
 4.3944
52 acl graft
 4.1589
52 anterior horn
 4.1589
52 patella cartilage
 4.1589
52 mcl grade
 4.1589
52 mri knee rt correlation
 4.1589
52 meniscal cyst
 4.1589
52 lateral facet
 4.1589
53 mri knee acl
 4.0236
54 joint line
 3.8123
55 medial aspect
 3.4657
55 posterior aspect
 3.4657
55 intra-articular body
 3.4657
55 loose body
loose bodies
 3.4657
55 residual bone
 3.4657
55 trochlear groove
 3.4657
55 trochlear notch
 3.4657
55 sub-chondral signal
 3.4657
56 pivot shift bone
 3.2958
56 posterolateral corner injury
postero-lateral corner injury
 3.2958
56 mri knee correlation
 3.2958
56 lateral patellar dislocation
lateral patella dislocation
 3.2958
56 lateral patellar facet
lateral patella facet
 3.2958
56 medial joint line
medial joint lines
 3.2958
57 grade ll mcl injury
 3.2189
58 abnormal signal
 2.7726
58 biceps tendons
 2.7726
58 cartilage fragment
 2.7726
58 complete transection
 2.7726
58 osteochondral compression
 2.7726
58 popliteal cyst
 2.7726
58 patella dislocation
 2.7726
58 medial facet
 2.7726
58 musculo-tendineous junction
musculo-tendinious junction
musculo-tendinous junction
musculotendinous junction
 2.7726
58 lateral side
 2.7726
58 supra-patella pouch
supra-patellar pouch
 2.7726
58 sagittal sequences
sagittal sequence
 2.7726
59 mri knee normal appearance
 2.7465
60 cartilage signal
 2.4260
60 compression fracture
 2.4260
60 compression injury
 2.4260
61 bone marrow signal
 2.1972
61 subchondral signal change
 2.1972
61 posterolateral corner structures
 2.1972
61 subchondral cyst formation
 2.1972
61 subchondral marrow oedema
 2.1972
62 inferior aspect
 2.0794
62 bone bruise
 2.0794
62 tibial condyles
 2.0794
62 menisci cruciate
 2.0794
62 depression fracture
depressed fracture
 2.0794
62 donor site
 2.0794
62 knee effusion
 2.0794
62 remnant fibers
 2.0794
62 intra-articular fragment
 2.0794
62 grade l sprain
grade ll sprain
 2.0794
62 intercondylar groove
inter-condylar groove
 2.0794
62 rotational injury
 2.0794
62 valgus injury
 2.0794
62 inter-condylar region
intercondylar region
 2.0794
62 medial oa
 2.0794
62 meniscal surgery
 2.0794
62 patello-femoral oa
 2.0794
62 posterior portion
 2.0794
63 meniscal injury
 1.7329
64 proximal acl
 1.3863
64 patella apex
 1.3863
64 focal areas
 1.3863
64 cartilage irregularities
cartilage irregularity
 1.3863
64 central ridge
 1.3863
64 tibio-femoral compartments
tibiofemoral compartment
 1.3863
64 focal defect
 1.3863
64 normal examination
 1.3863
64 peripheral extrusion
 1.3863
64 thickness fissure
 1.3863
64 tip of hoffa
 1.3863
64 menisco-capsular injury
 1.3863
64 varus injury
 1.3863
64 knee joint
 1.3863
64 linear signal
 1.3863
64 medial retinaculum
 1.3863
65 anterior fibers
 0.6931
65 cartilage fissuring
 0.6931
65 lateral collateral
 0.6931
65 knee injury
 0.6931
65 osteo-chondral injury
 0.6931
65 intrasubstance high signal
 0.6931
65 lateral plateau
 0.6931