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 28, 2018	$	242.1		$	51.5		$	293.6
Business combination	22.5			—			22.5
Measurement period adjustment to a business combination in prior year	(4.7		)	—			(4.7		)
Foreign currency translation adjustments	—			(0.7		)	(0.7		)
Balance at December 28, 2018	$	259.9		$	50.8		$	310.7

See Note 2, "Business Combinations," for more information.

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



	December 28, 2018							September 28, 2018
(In millions)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Technologies and patents	$	141.6	$	(77.2	)	$	64.4	$	139.6	$	(73.9	)	$	65.7
Customer contracts and supplier relationship	44.4		(20.6		)	23.8		44.9		(19.1		)	25.8
Other	6.1		(5.8		)	0.3		6.6		(5.8		)	0.8
Total intangible with finite lives	192.1		(103.6		)	88.5		191.1		(98.8		)	92.3
In-process research and development with indefinite lives	8.8		—			8.8		8.8		—			8.8
Total intangible assets	$	200.9	$	(103.6	)	$	97.3	$	199.9	$	(98.8	)	$	101.1

Amortization expense for intangible assets was $4.7 million and $6.3 million during the three months ended December 28, 2018 and December 29, 2017, respectively.

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



Fiscal Years:	Remaining Amortization Expense
Remainder of 2019	$	16.3
2020	19.3
2021	15.5
2022	14.1
2023	13.3
Thereafter	10.0
Total remaining amortization for intangible assets	$	88.5