GOODWILL AND INTANGIBLE ASSETS

The following table reflects the activity of goodwill by reportable operating segment:



(In millions)	Oncology Systems			Proton Solutions			Total
Balance at September 30, 2016	$	170.2		$	49.8		$	220.0
Foreign currency translation adjustments	—			2.6			2.6
Balance at September 29, 2017	170.2			52.4			222.6
Business combinations	72.1			—			72.1
Foreign currency translation adjustments	(0.2		)	(0.9		)	(1.1		)
Balance at September 28, 2018	$	242.1		$	51.5		$	293.6

The following table reflects the gross carrying amount and accumulated amortization of the Company’s intangible assets, net:



	September 28, 2018							September 29, 2017
(In millions)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Technologies and patents	$	139.6	$	(73.9	)	$	65.7	$	102.0	$	(60.9	)	$	41.1
Customer contracts and supplier relationship	44.9		(19.1		)	25.8		33.9		(14.3		)	19.6
Other	6.6		(5.8		)	0.8		5.5		(3.4		)	2.1
Total intangible with finite lives	191.1		(98.8		)	92.3		141.4		(78.6		)	62.8
In-process research and development with indefinite lives	8.8		—			8.8		8.8		—			8.8
Total intangible assets	$	199.9	$	(98.8	)	$	101.1	$	150.2	$	(78.6	)	$	71.6

Amortization expense for intangible assets was $20.6 million , $16.6 million and $10.1 million for fiscal years 2018, 2017 and 2016, respectively.

As of September 28, 2018, the Company estimates that its remaining amortization expense for intangible assets with finite lives will be as follows (in millions):



Fiscal Years	Total
2019	$	18.2
2020	18.7
2021	14.1
2022	12.7
2023	12.0
Thereafter	16.6
Total remaining amortization	$	92.3